Question about Goodman GMS90703BXA Heater

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With the thermostat at 70 and the house temp at 62 it doesn't start. I move thermostat from auto to manual heat and the fan blows but no heat. the system is 4 years old. gas is on but i think the pilot light is not starting the heater.

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  • wmnixdorf May 11, 2010

    you nee to watch it go though a cycle. DO you get a orange glow? does the small motor comeon?

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Check the air cleaner, exhaust vent for Ice or obstructions. Take off the front cover, tape down the door switch and tell us what happends. Look thru a small window for flashes of light on a control as well as an orange glow. Get back to us.

Posted on Jan 02, 2009

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SO basically my furnace just stop kicking on the heat at some point last night. I have it set on an auto temp around 70. By the time I noticed it being cold in the house I went up to the thermostat and...


I want you to do a simple test to verify that this is a thermostat problem for me. Start by removing the thermostat from its' mounting, next locate the red and white wire terminals place a jumper between them. If the heater now runs it is the thermostat went bad on you, if it does not run please check all connections both to the thermostat and to the furnace making sure that your wires have tight connections and are not broken. I am really leaning towards the thermostat being bad here. Sorry for the bad news but really strong feeling. Good luck

Jan 12, 2011 | Goodman Heaters

1 Answer

Hi. I am not getting any heat. I have a White-Rodgers manual mercury thermostat model 1F56-501 and natural gas heat with GOODMAN packaged gas/electric model PGB024050-1 Before I call a service rep, I...


Hello,Good job with description.Something is keeping the condenser off(saftey).Do you have an emergency heat setting on the therm.It will run electric heat strips only until service can check it out.Very rare that the disconnect switch (black box) is it.Need electrical meter to prove it out.

Dec 01, 2010 | Goodman Heaters

1 Answer

Temp doesn't shut down when preset temp reached. Have to do it myself. Set it for 62 for example, won't come on till I set it to maybe 70. Try to set the temp to maybe 65, doesn't shut down till we...


This is normal. It will only turn on when the temperature set is below the ambient temperature in the area around the thermostat.

Your problem may be the location of the thermostat is not ideal form the areas you are heating. this usually cause the temperature in areas vary from the thermostat to the point wher relocation of the thermostat is sometimes the best resolution.
this is often the case wher ther are multiple heating zines in a building, and one or more zones interfere with the thermostat of others,

but it also happen in single zone heating systems too.

Jan 30, 2010 | DeLonghi DCH4120 SafeHeat Ceramic Compact...

1 Answer

Heater works, but only on Emergency Mode


It sounds like you have a "setback thermostat" A control intended to increase efficiency by allowing the fan to run for an adjustable amount of time after the heater turns off, whether the heater is electric or part of a heat pump. If the "setback" time is too long, the element will cool off and the fan will blow cold air. Try and locate the instructions for the thermostat and see if the "fan run time after heat turn off" is adjustable and reduce it by half. Most emergency heat circuits bypass control circuits (its an emergency, you know), and require manual control.

Jan 11, 2010 | Heaters

2 Answers

My Honeywell thermostat does not heat the house to the selected temperature. It will come on but not long enough to heat the house to the temp I selected.


Verify that you have heat coming from the vents.
Also do you use a heat pump system with electric emergency heat?
It may be that if it is to cold outside that the heat pump can not handle the load due to the cold outside and you will need to turn on the emergency heat.
Keep me posted.

FlaTech.
Thank you for using FixYa!

Nov 17, 2009 | Honeywell Heaters

1 Answer

My Honeywell TH4210D1005 Thermostat will not respond


well with 62 outside temp and then maybe a little solar gain and body heat you very well could be 5 degrees warmer then outside

Apr 06, 2009 | Honeywell TH4210D1005 Heater

1 Answer

Have gas furnace and this winter,began having


The Thermostat Wizard is an interactive tool that will guide you through wiring and troubleshooting your thermostat, as well as programming it to the most comfortable settings for you and your family. Simply answer the questions from the Thermostat Wizard to correctly connect, troubleshoot and/or program your Honeywell Thermostat. You can even print the instructions and bring them right to the thermostat to help make things easier.
Go to: http://yourhome.honeywell.com/Consumer/Cultures/en-US/Support/Thermostat+Wizard/

However - the problem is probably not with your thermostat but with your furnace. It is most likely a dirty flame sensor - a maintenance issue. If you have not had your furnace serviced recently (more than 1 year) that is where you should start. Modern furnaces require regular maintenance.


Please rate my answer!

Feb 28, 2009 | Honeywell Electronic Programmable...

1 Answer

Thermostat temperatures not reaching preset Energy Star settings


Well with a boiler system like you have it will cost you more money to heat your house that way than if you leave it like it is. With a boiler system it takes a lot longer to heat an area than with a furnace. The best thing you can do is find a happy medium and leave it there at all times. If you read the paper work on your new thermostats they have a set procedure which tells the thermostat if you have forced air or boiler system. Do you have baseboard or in-floor heat how many zones do you have.

Jan 07, 2009 | Honeywell Electronic Programmable...

1 Answer

Loss of temperature control


Is the heater staying on all the time? Most likely cause of themostat trouble is the sensor. Try to find it and measure its resistance at different temps to verify the trouble.

Dec 31, 2007 | Honeywell CT3200 5-2 Day Electronic...

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