Question about Goodman GMS90703BXA Heater

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Pilot on but no heat to radiators

Our heat is not on , the pilot is lit but no heat is in the radiators. we don't know alot about plumbing or heating and we have a newborn in the house, so we need to do something. don't have much money either. any help would be greatly appreciated in terms women can understand(those of us not educated in this area)

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  • el wapo Feb 19, 2008

    three rads upstairs at back of house not heating all other rads in house working normally.House is oil heated



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There is a gas valve inside the heater (is it on?), There is also sometimes an electric starter that goes bright on start (is it?), Do you hear whirring noises on start? Is the valve switch set to ON?

I have one of these and if the pilot (electrical) turns on and the gas is not flowing then is senses a heat failure and stops. Then on the control board light blinks (seen through plastic cover).

These also have to spin an exhaust fan, that bearing sticks, if it fails to turn, the unit will fail to start after 1 min. Does any of that makes sense?

Posted on Nov 10, 2007


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No Hot Water

Well, let's start the trouble shooting process with trying to get the pilot lit...
Have you removed the cover at the bottom of the heater?-- Can you see an pilot light inside?

If not, Can you try lighting the pilot-- and noticing how the pilot flam heats the little ThermoCouple (TC)?
Note: In order for gas to flow thru the main control valve, the pilot light has to be heating the TC-- to generate a voltage, that in turn allows the main gas valve to open.
Do you need help in getting the pilot light lit?-- do you understand the need to hold down the start button, until the TC gets heated up?

Let us know what you find

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If it is electric heat strips or a heat pump there is nothing to do other than turn t-stat to heat and make sure all 220 breakers are in the on position.

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