GOODMAN GAS FURNACE IO MANUAL GMS8 GDS8 GHS8 [PDF] (2005) Gas-Fired Warm Air Furnace, Single Stage, Category 1, Goodman Manufacturing Co., L.P. GOODMAN MES9 & CES9 FURNACE INSTALLATION INSTRUCTIONS [PDF] (2019) GOODMAN FURNACE HIGH TEMPERATURE PLASTIC VENT HTPV SAFETY RECALL [Web article] US CPSC notice I have a Amana AM9C960603ANAA. I'm getting 2 codes on the LCD display. First is 1dl and the second one is EE5. What do - Answered by a verified HVAC TechnicianTrane furnace code 1dl. Troubleshooting a Trane furnace with code 1DL is a common challenge homeowners face. Code 1DL stands for “Inadequate Diffuser Pressure Switch Closure” and can occur due to problems with the furnace blower motor, evaporation motor, heat exchanger or other related components.The controller will indicate a fault condition by flashing the fault LED. The flashing pattern will be ¼ second on and ¼ second off for each count, if multiple faults are present it will dwell 2 seconds between each fault code, then dwell 5 seconds and repeat until the fault(s) are cleared. Listed below are the fault codes. 1 flash – Not UsedThe AVPTC61D14 air handler is rated for an output of 5 tons. In many cases, this tonnage will be larger than the condenser it is paired with, which increases the overall efficiency of the unit. Please note that this air handler needs a condenser to heat or cool. For straight heating or when backup heat is necessary in a heat pump application ...View and Download Goodman AVPTC42D14 series installation & operating instructions manual online. AVPTC**14 series. AVPTC42D14 series air handlers pdf manual download. Also for: Avptc48d14 series, Avptc30c14 series, Avptc36c14 series, Avptc24b14 series, Avptc48c14 series, Avptc60d14...Turn off power to the furnace and check the inlet gas pressure. Minimum Pressure = 5" w.c. for Nat. Gas, and 11" w.c. for Propane. No or Low Pressure = Bad Meter or Regulator; Normal Pressure ⇒ Continue; Re-apply power to the furnace and activate a call for heat. Make sure the inlet gas pressure stays above minimum when the gas valve energizes.View and Download Goodman AVPTC42D14 series installation & operating instructions manual online. AVPTC**14 series. AVPTC42D14 series air handlers pdf manual download. Also for: Avptc48d14 series, Avptc30c14 series, Avptc36c14 series, Avptc24b14 series, Avptc48c14 series, Avptc60d14... If the furnace is running, turn the thermostat off and allow the furnace to cool and the blower to stop operating. Initiate a call for heat from the thermostat and monitor the ignition sequence. 1. The inducer motor should start with no difficulty. 2. The pressure switch should close within a couple seconds of the inducer starting. 3.FIX: Adjust the gas pressure according to the information available to you. CODE: Eight LED flashes. PROBLEM: This means your furnace has an igniter circuit problem due to a defective igniter or an improperly connected igniter. FIX: Replace the igniter or check the ground wiring for defects. CODE: Nine LED flashes.1dl code has appeared on our Goodman ac, Yes to both. Since last night, reset everything, ... I hav e GMV95 Goodman Furnace and air about 6 months old. Air has worked ...Nov 29, 2014 · A quick look at goodman trouble codes on a goodman furnace. Some simple hints on what those codes can indicate what the problem could be. Amazon link to Gre... GMES80-U. Goodman furnace features: Multi-speed motor, ultra-low NOx, fault code LED output, quiet draft inducer. Pros and cons: With an 80 percent AFUE rating, this is one of Goodman’s least efficient furnaces. This is a single-stage model, which means it is a less energy efficient but more affordable option.Select the brand from the drop down menu. 2. Next select the model number from Model drop down box. 3. Move through the remaining menus. 4. Once all menus have been satisfied push the SUBMIT button. 5. To reset the search for a new search click the SEARCH button.View and Download Goodman AVPTC42D14 series installation & operating instructions manual online. AVPTC**14 series. AVPTC42D14 series air handlers pdf manual download. Also for: Avptc48d14 series, Avptc30c14 series, Avptc36c14 series, Avptc24b14 series, Avptc48c14 series, Avptc60d14...Open the gas valve fully in a counterclockwise motion to make sure the gas supply is turned on. Increase the temperature on the thermostat, and turn the mode to "Heat" after making sure the vents are all clear of blockages. Disconnect the power to reset the furnace, and contact Trane if necessary.The CoolCloud HVAC application allows contractors to connect and communicate wirelessly via Bluetooth with Goodman and Amana premium air handler and furnace control boards. This provides a more efficient means for servicing and maintaining equipment, making configuration adjustments, gaining equipment status, performing diagnostics, viewing ... Welcome to TWINTECH Heating & Cooling Keeping families comfortable for over 30 years. Check out our seasonal promotions. TWINTECH is a full-service HVAC care and maintenance provider located in Durham, Ontario. operating both with a Nest Smart thermostat about 8-10 yrs old…heating program always ran fine with Lennox…now the program doesn't always work…thermostat is lit up showing it's calling for heat but furnace is not running…I turn thermostat off and back on and furnace starts to run…View and Download Goodman AVPTC42D14 series installation & operating instructions manual online. AVPTC**14 series. AVPTC42D14 series air handlers pdf manual download. Also for: Avptc48d14 series, Avptc30c14 series, Avptc36c14 series, Avptc24b14 series, Avptc48c14 series, Avptc60d14... Feb 10, 2023 · Besides Goodman fault codes, there are the messages which can also appear, status and data related to these codes. This information can give you the idea about any necessary further actions – for example, 3 flashes mean that Goodman pressure switch stuck open, and 2 flashes mean the same part stuck closed. GOODMAN GAS FURNACE IO MANUAL GMS8 GDS8 GHS8 [PDF] (2005) Gas-Fired Warm Air Furnace, Single Stage, Category 1, Goodman Manufacturing Co., L.P. GOODMAN MES9 & CES9 FURNACE INSTALLATION INSTRUCTIONS [PDF] (2019) GOODMAN FURNACE HIGH TEMPERATURE PLASTIC VENT HTPV SAFETY RECALL [Web article] US CPSC noticeSelect the brand from the drop down menu. 2. Next select the model number from Model drop down box. 3. Move through the remaining menus. 4. Once all menus have been satisfied push the SUBMIT button. 5. To reset the search for a new search click the SEARCH button.I am always available if you want to use your “Request Call Option “ And if you don’t get another message right after this greeting it’s because I’m more then likely I’m in the process of writing another message to you. that number is ***** the air conditioning coil that is on top of the furnace.Nov 30, 2019 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ... My brand new 2 ton Goodman is tripping the cb when outside 8/7/2023. I have an issue with my Goodman air conditioner, I do not 8/6/2023. I have a Goodman central air unit washed the condenser clean 8/6/2023. Ok. Opening a new thread I have got a Goodman heat pump unit 8/3/2023. I'm working on a Goodman 5 ton and the high pressure lines 8/1/2023.Welcome to TWINTECH Heating & Cooling Keeping families comfortable for over 30 years. Check out our seasonal promotions. TWINTECH is a full-service HVAC care and maintenance provider located in Durham, Ontario. A 1dl code on the Goodman furnace uses a digital thermostat to regulate and control the furnace, saving time and energy. A digital thermostat is an electronic device that regulates the heating of buildings or spaces to regulate the conditions inside.https://www.alwaysopen.caGoodman Furnace Fault CodesOpen the gas valve fully in a counterclockwise motion to make sure the gas supply is turned on. Increase the temperature on the thermostat, and turn the mode to "Heat" after making sure the vents are all clear of blockages. Disconnect the power to reset the furnace, and contact Trane if necessary.Mar 23, 2017 · Troubleshooting GMEC96 Fault Status Codes •Fault Code Example 1: Status light displays “4 Red flashes.” •Refer to the “troubleshooting” chart on page 44 of the GMEC96 service manual. •Also, find your “fault symptoms and description” in the troubleshooting chart on pages 42-43. Dec 23, 2022 · Goodman manufacturing. it is displaying code 1dl and the green light is flashing two long, five short. anything I can - Answered by a verified HVAC Technician Jan 18, 2014 · GMVC95 goodman furnace issue I had a brand new GMVC951155DXA installed in my house, along with a Comfortnet CTK03 thermostat, and brand new DSZC16 heat pump. Immediately after starting the system, I had a prompt on the thermostat that says E2 PS1 (Low pressure switch stuck open). The rollout switches detect heat where it shouldn’t be. Faulty switches are indicated by nine flashes on the Goodman furnace LED. You can try replacing your furnace filter or contact technicians if it does not work. Call Immediate Services To Fix Your Furnace Issues Today. You may be able to fix most of your furnace issues by following the ... Mar 31, 2023 · No Still going up this codes. F01 EE0. HVAC Technician: airheatman. If it lights and goes out try cleaning the flame sensor and see if that helps. Code says the board is not receiving signal that we are getting flame. Ask Your Own HVAC Question. HVAC Technician: airheatman. I have a Amana AM9C960603ANAA. I'm getting 2 codes on the LCD display. First is 1dl and the second one is EE5. What do - Answered by a verified HVAC TechnicianWe recently had a new Goodman furnace installed. We have an old programmable Honeywell thermostat. The problem I'm having now is that the thermostat reads 68 (is set to 75) and the furnace isn't comin … read morePurchase Your HVAC Equipment Direct | Goodman AC And Furnace ... 67. Ambient Temperature Sensor Fault (Out of Range – Open or Shorted) ERR 67. 6 Flash. Coil Temperature Sensor Fault (Out of Range – Open or Shorted) Low Pressure Cut Out Fault (Open outside of defrost Cycle-Hard lock out, cycle power to reset) ERR 79.AMANA & GOODMAN FAULT CODES. 1. One led flash that stays on continuously = No signal from thermostat. Turn off power and check connections. 2. One led that flashes = Furnace lockout after three attempts to fire. Must be reset by lowering it for twenty seconds and then raise it back. After one hour furnace will reset itself. 3.Feb 4, 2017 · Hi just hooked up my Goodman furnace and as soon as I put the power on the 3:00 a.m. fuse blue. AnyHi just hooked up my Goodman furnace and as soon as I put the power on the 3:amp. fuse blew. Any sugg … read more Mar 1, 2022 · Code 1 – Furnace ignition failure. The control board has detected that the furnace failed to ignite. The control board has detected that the furnace failed to ignite. This could be due to low voltage, high resistance, or dirty terminals on the furnace primary control. I have a Amana AM9C960603ANAA. I'm getting 2 codes on the LCD display. First is 1dl and the second one is EE5. What do - Answered by a verified HVAC TechnicianNo signal from the thermostat. Turn off the unit’s power and check connections. Single LIGHT flash. Furnace lockout due to an excessive number of ignition retries. Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour. 2 LIGHT flashes.Mar 31, 2023 · No Still going up this codes. F01 EE0. HVAC Technician: airheatman. If it lights and goes out try cleaning the flame sensor and see if that helps. Code says the board is not receiving signal that we are getting flame. Ask Your Own HVAC Question. HVAC Technician: airheatman. Turn off power to the furnace and check the inlet gas pressure. Minimum Pressure = 5" w.c. for Nat. Gas, and 11" w.c. for Propane. No or Low Pressure = Bad Meter or Regulator; Normal Pressure ⇒ Continue; Re-apply power to the furnace and activate a call for heat. Make sure the inlet gas pressure stays above minimum when the gas valve energizes.Get professional furnace and air conditioning installation, maintenance, and 24-hour repair services with SNAP Heating & Air Conditioning. Our licensed and experienced technicians are available around the clock to provide prompt and reliable service to keep your home comfortable all year long.Dec 21, 2011 · AMANA & GOODMAN FAULT CODES. 1. One led flash that stays on continuously = No signal from thermostat. Turn off power and check connections. 2. One led that flashes = Furnace lockout after three attempts to fire. Must be reset by lowering it for twenty seconds and then raise it back. After one hour furnace will reset itself. 3. Post Tags: # Furnace # Goodman # Goodman Furnace Minhazul Abedin With an extensive background and experience in various aspects of construction and renovation, he has established himself as a trusted authority in creating beautiful and functional living spaces.If the furnace is running, turn the thermostat off and allow the furnace to cool and the blower to stop operating. Initiate a call for heat from the thermostat and monitor the ignition sequence. 1. The inducer motor should start with no difficulty. 2. The pressure switch should close within a couple seconds of the inducer starting. 3.4th of July Deals - Purchase Your HVAC Equipment Direct ...FIX: Adjust the gas pressure according to the information available to you. CODE: Eight LED flashes. PROBLEM: This means your furnace has an igniter circuit problem due to a defective igniter or an improperly connected igniter. FIX: Replace the igniter or check the ground wiring for defects. CODE: Nine LED flashes.The AVPTC61D14 air handler is rated for an output of 5 tons. In many cases, this tonnage will be larger than the condenser it is paired with, which increases the overall efficiency of the unit. Please note that this air handler needs a condenser to heat or cool. For straight heating or when backup heat is necessary in a heat pump application ... RESULT: No signal from thermostat. FIX: Turn off power and check connections. CODE: One led that flashes. RESULT: Furnace lockout after three attempts to fire. FIX: Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour.Most popular furnace brands in Canada There are several popular furnace brands available in Canada, and the most popular ones are: Lennox Carrier Trane Bryant York Goodman Rheem American Standard Armstrong Air Napoleon These brands offer a range of furnace... ERROR LIGHT = Y. SUGGESTED ACTION = Clean Condenser Coils, Check Fan for fault. Code will reset afier cleaning. CODE = C5. AIRF LOW ALERT. STATUS = Outdoor Coil temperature too high for outdoor ambient temperature. DISPLAY = N. ERROR LIGHT = Y. SUGGESTED ACTION = Check for Blocked Outdoor Air or Clean Coil. To receive the Lifetime Compressor Limited Warranty (good for as long as you own your home), Lifetime Heat Exchanger Limited Warranty (good for as long as you own your home), 10-Year or 2-Year Unit Replacement Limited Warranty, 20-Year Heat Exchanger Limited Warranty, and 10-Year Parts Limited Warranty, online registration must be completed ... Select the brand from the drop down menu. 2. Next select the model number from Model drop down box. 3. Move through the remaining menus. 4. Once all menus have been satisfied push the SUBMIT button. 5. To reset the search for a new search click the SEARCH button.Goodman furnaces are among the most recognized and respected forced-air heating systems. Its reputation was built on a foundation of quality core product development, manufacturing excellence, and engineering expertise. Keeping that reputation alive means continuous improvement through product innovation and the introduction of new features reflecting advances in technology. Many components ...Feb 10, 2023 · 67. Ambient Temperature Sensor Fault (Out of Range – Open or Shorted) ERR 67. 6 Flash. Coil Temperature Sensor Fault (Out of Range – Open or Shorted) Low Pressure Cut Out Fault (Open outside of defrost Cycle-Hard lock out, cycle power to reset) ERR 79. 1dl code has appeared on our Goodman ac, Yes to both. Since last night, reset everything, ... I hav e GMV95 Goodman Furnace and air about 6 months old. Air has worked ...goodman air conditioner error codes1. the thermostat demand signal is intermittent. 2. Time delay relay or control board faulty. 3. If high pressure switch is present, go to Flash Code 2 information. 4. If a low pressure switch is present, go to Flash Code 1 information. Status LED: Yellow “ALERT” Flash Code 4. Status LED Description: off rotor.To check for these signs of a dirty or defective furnace sensor, follow these steps: Switch off the furnace. Close the gas supply valve. Open the furnace and locate the flame sensor. Assess the flame sensor for soot and corroding or cracked/damaged sensor porcelain insulation.RESULT: No signal from thermostat. FIX: Turn off power and check connections. CODE: One led that flashes. RESULT: Furnace lockout after three attempts to fire. FIX: Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour. Trane furnace code 1dl. Troubleshooting a Trane furnace with code 1DL is a common challenge homeowners face. Code 1DL stands for “Inadequate Diffuser Pressure Switch Closure” and can occur due to problems with the furnace blower motor, evaporation motor, heat exchanger or other related components.Sep 29, 2022 · If the furnace is running, turn the thermostat off and allow the furnace to cool and the blower to stop operating. Initiate a call for heat from the thermostat and monitor the ignition sequence. 1. The inducer motor should start with no difficulty. 2. The pressure switch should close within a couple seconds of the inducer starting. 3. ERROR LIGHT = Y. SUGGESTED ACTION = Clean Condenser Coils, Check Fan for fault. Code will reset afier cleaning. CODE = C5. AIRF LOW ALERT. STATUS = Outdoor Coil temperature too high for outdoor ambient temperature. DISPLAY = N. ERROR LIGHT = Y. SUGGESTED ACTION = Check for Blocked Outdoor Air or Clean Coil. Last Udated: August 23, 2023. The Goodman 1DL error code is a common problem in Goodman furnaces. It indicates a problem with the low-voltage transformer, which provides power to the furnace’s control board and other components.The furnace filter is generally on the return duct right before the furnace. A dirty filter causes blockage of airflow. A dirty filter causes blockage of airflow. This results in a furnace overheating and shuts off too quickly before your house gets heated up. Mar 26, 2022 · I am always available if you want to use your “Request Call Option “ And if you don’t get another message right after this greeting it’s because I’m more then likely I’m in the process of writing another message to you. that number is ***** the air conditioning coil that is on top of the furnace. No Still going up this codes. F01 EE0. HVAC Technician: airheatman. If it lights and goes out try cleaning the flame sensor and see if that helps. Code says the board is not receiving signal that we are getting flame. Ask Your Own HVAC Question. HVAC Technician: airheatman.https://www.alwaysopen.caGoodman Furnace Fault Codescode (if there is no fault or protection code it will be display “nn”) Normal display Display “--” Operating mode 3—Heating; 4—Forced cooling） Operating fan speed grade (0—Power off) The total capacity requirements of the interior unit The capacity requirements of the revised external unit T3 piping temperature T4 environmert ... Once again Twin Tech came through and fixed my furnace. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room it s just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantasticThe rollout switches detect heat where it shouldn’t be. Faulty switches are indicated by nine flashes on the Goodman furnace LED. You can try replacing your furnace filter or contact technicians if it does not work. Call Immediate Services To Fix Your Furnace Issues Today. You may be able to fix most of your furnace issues by following the ...May 11, 2019 · STATUS: Discharge Air Too Hot. SUGGESTED ACTION: Clean Filter or Remove Air Blockage. CODE: LC. STATUS: Outdoor Coil Thermistor temperature high. SUGGESTED ACTION: Clean Condenser Coils, Check Fan for fault. Code will reset after cleaning. CODE: C2. STATUS: Indoor Air Recirculation. Large delta between thermostat and return. The CoolCloud HVAC application allows contractors to connect and communicate wirelessly via Bluetooth with Goodman and Amana premium air handler and furnace control boards. This provides a more efficient means for servicing and maintaining equipment, making configuration adjustments, gaining equipment status, performing diagnostics, viewing ...Turn off the furnace or the breaker box. Check the filter to make sure it’s clean, and replace it if necessary. Inspect the furnace and vents for dirt and debris, and vacuum them if necessary. Turn the furnace back on. Check that the thermostat is set to Heat and set for higher than room temperature.Mar 24, 2023 · To check for these signs of a dirty or defective furnace sensor, follow these steps: Switch off the furnace. Close the gas supply valve. Open the furnace and locate the flame sensor. Assess the flame sensor for soot and corroding or cracked/damaged sensor porcelain insulation. specified on the furnace rating plate and OPERATIONAL CHECKS section of these instructions. When furnace duct(s) supply air outside the space contain-ing the furnace, a return air duct must terminate in the same space as the supply duct and be sealed to the furnace casing. A gas-fired furnace for installation in a residential garage
No Still going up this codes. F01 EE0. HVAC Technician: airheatman. If it lights and goes out try cleaning the flame sensor and see if that helps. Code says the board is not receiving signal that we are getting flame. Ask Your Own HVAC Question. HVAC Technician: airheatman.. Gmail app privacy reddit
Hi just hooked up my Goodman furnace and as soon as I put the power on the 3:00 a.m. fuse blue. AnyHi just hooked up my Goodman furnace and as soon as I put the power on the 3:amp. fuse blew. Any sugg … read moreWe recently had a new Goodman furnace installed. We have an old programmable Honeywell thermostat. The problem I'm having now is that the thermostat reads 68 (is set to 75) and the furnace isn't comin … read moreRESULT: No signal from thermostat. FIX: Turn off power and check connections. CODE: One led that flashes. RESULT: Furnace lockout after three attempts to fire. FIX: Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour.As an armature, I have some experience troubleshooting furnace problems. I have a 1.5 ton Goodman furnace that cools and heats. The circuit bd. Is B25578-00A. The unit is 25 years old and has been wor … read moreGet professional furnace and air conditioning installation, maintenance, and 24-hour repair services with SNAP Heating & Air Conditioning. Our licensed and experienced technicians are available around the clock to provide prompt and reliable service to keep your home comfortable all year long.The duration of warranty coverage in Texas and Florida differs in some cases. ** For installation in California’s South Coast Air Quality Management District (SCAQMD) only: This furnace does not meet the SCAQMD Rule 1111 14 ng/J NOx emission limit, and thus is subject to a mitigation fee of up to $450. This furnace is not eligible for the ... Mar 24, 2023 · To check for these signs of a dirty or defective furnace sensor, follow these steps: Switch off the furnace. Close the gas supply valve. Open the furnace and locate the flame sensor. Assess the flame sensor for soot and corroding or cracked/damaged sensor porcelain insulation. F1. Failed Electronic Range Control (ERC) Repair Electronic Range Control (ERC) F2. Oven too hot. Replace oven temperature sensor. F3, F4. Shorted or open oven temperature sensor. F5, F6, F8.Aug 16, 2023 · Possible Causes for 4 flashes on a Goodman furnace. • Check filters andductwork for blockage.Clean filters or removeobstruction. circulator blower speed, orfailed circulator blower. • Check circulator blowerspeed and performance.Correct speed or replaceblower if necessary. • Misaligned burners, blockedflue and/or air inlet pipe, orfailed ... RESULT: No signal from thermostat. FIX: Turn off power and check connections. CODE: One led that flashes. RESULT: Furnace lockout after three attempts to fire. FIX: Locate and correct gas interruption. Reset by lowering it for 20 seconds and then raise it back, furnace will reset itself after one hour. ERROR LIGHT = Y. SUGGESTED ACTION = Clean Condenser Coils, Check Fan for fault. Code will reset afier cleaning. CODE = C5. AIRF LOW ALERT. STATUS = Outdoor Coil temperature too high for outdoor ambient temperature. DISPLAY = N. ERROR LIGHT = Y. SUGGESTED ACTION = Check for Blocked Outdoor Air or Clean Coil.4th of July Deals - Purchase Your HVAC Equipment Direct ...Welcome to TWINTECH Heating & Cooling Keeping families comfortable for over 30 years. Check out our seasonal promotions. TWINTECH is a full-service HVAC care and maintenance provider located in Durham, Ontario. Display Codes D3 – Airflow CFM Mismatch Diagnostic Description Indoor air movers (air handlers / furnaces) cannot supply the airflow required for proper system operation. Possible Cause Misplaced indoor air mower-replacement with incorrectly sized air handler / furnace.Turn off power to the furnace and check the inlet gas pressure. Minimum Pressure = 5" w.c. for Nat. Gas, and 11" w.c. for Propane. No or Low Pressure = Bad Meter or Regulator; Normal Pressure ⇒ Continue; Re-apply power to the furnace and activate a call for heat. Make sure the inlet gas pressure stays above minimum when the gas valve energizes.Post Tags: # Furnace # Goodman # Goodman Furnace Minhazul Abedin With an extensive background and experience in various aspects of construction and renovation, he has established himself as a trusted authority in creating beautiful and functional living spaces.The furnace filter is generally on the return duct right before the furnace. A dirty filter causes blockage of airflow. A dirty filter causes blockage of airflow. This results in a furnace overheating and shuts off too quickly before your house gets heated up.code (if there is no fault or protection code it will be display “nn”) Normal display Display “--” Operating mode 3—Heating; 4—Forced cooling） Operating fan speed grade (0—Power off) The total capacity requirements of the interior unit The capacity requirements of the revised external unit T3 piping temperature T4 environmert ... GMES80-U. Goodman furnace features: Multi-speed motor, ultra-low NOx, fault code LED output, quiet draft inducer. Pros and cons: With an 80 percent AFUE rating, this is one of Goodman’s least efficient furnaces. This is a single-stage model, which means it is a less energy efficient but more affordable option..