Question about Goodman GMS90703BXA Heater

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Goodman gmt070-4a wont heat, like the pilot light is out or something

The heater will kick on, but no heat... I had the gas shut off a few months back, so I think i maight need to ignite the pilot light like I did the water heater... How do I accomplish this feat?

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Turn gas supply on....turn gas valve to pilot....press down and hold to allow gas to come through pilot tubing.....light the pilot right by the thermal couple, once lit hold valve down for about 60-90 secs...then release ur hand on the gas valve and turn the valve to on position............make sure the bloody tstat is turned off before doin anything other wise burners will fire up soon as you turn valve to on position

Posted on Dec 05, 2013

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Posted on Jan 02, 2017

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Therinnaiguy
  • 1420 Answers

SOURCE: Goodman HVAC Package Unit

Cycling the external switch on the GMS series will not help you. That switch is for A/C only. At the unit found inside the house, remove the front cover. If there is a door switch, tape it closed. Now if the thermostat is calling for heat, the unit will cycle as you mentioned. When the unit does not start, check for a blinking light on the circuit board. After three unsuccessful tries, the light will blink a code (2 blinks then a pause up to 9 blinks than a pause). Make a note of how many blinks you see. On the reverse side of the access panel you will find a diagnostic schematic. It should tell you a fault code corresponding with your blinking. This will give you a starting point where to look. If the codes are not found there, check inside your owner's manual. Or you can call Goodman at 713-861-250.
 
Get back to us with those codes and maybe we can help you further.

Posted on Oct 31, 2007

WebTeligent
  • 42 Answers

SOURCE: No heat, trouble shooting light has continious flash.

There is a vacuum sensor on most units tied from the exhaust gas fan to the sensor. Does the unit try to start? If the unit's exhaust fails to pull the switch it will turn off after about 30-45 sec after starting. "IT" thinks it's not exhausting and stops to keep from overheating. Do you have this exhaust fan and rubber hose to sensor? Can you see if that fan is turning on start?

Posted on Nov 10, 2007

  • 1 Answer

SOURCE: Heater not staying lit

my furnace pilot light is on but the burners will go off when we put the thermostat on auto. if we keep the fan on the burners will light but turn off the fan and and the burners go off

Posted on Jan 18, 2009

  • 1 Answer

SOURCE: my goodman gmt090-4 shuts off about 10 sec. after burners ignite

Clean the sensor with a piece of fine sand paper. It gets a coating on it after a few years of service. I had my cleaned for $160, it took five minutes.

Posted on Feb 03, 2009

  • 80 Answers

SOURCE: my goodman gas furnace is not kicking on. the

If you are not getting any codes from the board, then the furnace is not getting a call for heat from the thermostat. A wire may have come off, the thermostat not properly wired, or a break in the stat wire. On a call for heat, you should have 24vac between W and C on the circuit board. This will let you know if you are getting a call for heat all the way back to the furnace.

Posted on Oct 07, 2009

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