Question about Goodman GMS90703BXA Heater

1 Answer

No Heat The fan kicks on and blows cold air the sensor light flashes 3 times on the board. The fan is the only thing running

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 1,420 Answers
Re: No Heat

3 flashes indicate an issue with either the inducer, pressure switch, plugged condensate drain or a venting restriction.

Clear all debris from the exhaust and intake air piping. Make sure they are not drooping anywhere.
Check the pressure switch and the rubber hoses for blockage.
Blow out the drain line that evacuates the condensation.
On the inducer motor housing, un- plug the rubber hose going to the pressure switch and check to see if there is suction when the motor is running.
Make sure your air filter is clean.
Listen to the inducer motor as it turns for gurgling or any other abnormal sounds.

To make the heater run while you have the cabinet open, tape down the door safety switch. Remove the tape after diagnosos.

Posted on Dec 19, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have an older Carrier furnace type 58ss. The main burner will not ignite. Operating look ~ thermostat set @ 78 deg, switch furnace on, inducer fan running, pilot light clicks and ignites, inducer still...

power to gas valve ok .. Replace gas valve after checking gas valve coil for continuity/resistance... with valve removed ...and power to valve ... try blowing thru valve from supply side ... stuck valve.... replace...

Nov 01, 2013 | Heaters

1 Answer

The pole buiding 24 in hanging Dayton sometimes the blower comes on like after 5 minutes after everything else kicks in and sometimes like when its supposed to and sometimes not at all?? All the electric...

I'm not sure whether this is a gas unit or not. With many gas heaters, the blower comes on when the heat exchanger gets hot enough and goes off once the heat exchanger cools. Other things are happening before the blower goes on. The blower is normally controlled by a "fan control thermostat". This stat actuates the blower when the furnace is hot enough so that cold air is not being blown around and allows the blower to run until the furnace cools enough to get out the remaining heat after the flame shuts off but not so long to again allow cool air to blow around. If this fan control is malfunctioning, you will get erratic runs from the blower or the blower may not run at all or run long or continuously. The fan control is the first thing to check.

Jan 31, 2011 | Dayton Gas Furnace Heater

1 Answer

I have a Dayton Furnace Serial# swglm033942 and need some information; My furnace is installed in the attic and sometimes it will not blow hot air. I have tried to start it and the burners start up, but...

Please have this checked out by a technician. If there is a crack in the heat exchanger it could do just as you described. The blower blows air into the combustion chamber and blows out the burners.

Jan 07, 2011 | Dayton Gas Furnace Heater

1 Answer

Brivis Upflow/Downflow fan on continuously, no heat

depending on the year of the unit

if its between 1992-1999 it would be caused by the either the pilot not staying alight, or a faulty gas valve not opening,
These models start the fan on a time delay not tempreture so you will only get cold air circulating and when the thermostat is off the fan will stop.
(All models) if the fan is running regardless of the thermostat position an over heat sensor is faulty.

May 17, 2010 | Heaters

1 Answer

Auxilliary heat just started blowing cold air

SOund like you heating element has a open limit or the sequencer is bad. Another thing that it may be is the element wire has broken. Either way it sounds like you need a technician to come out and repair.

Jan 27, 2009 | Honeywell TH4210D1005 Heater

1 Answer

The fan comes on but the burner won't kick on and then shuts off

Check your fuel line for cracks and also the air line. Most likely is the CAD flame sensor, easy to change and only 3 bucks or so. Might also want to check all of your filters. Mine was doing the same thing and it was the high heat limit control and the flame sensor.

Jan 22, 2009 | Reddy R155D Utility Heater

2 Answers

Blower works but no heat

If in fact you have the above listed furnace, you do not have a pilot but electronic ignition. You will need to remove the front cover on the furnace, tape down the door safety switch and then have someone help you by turning up your thermostat to a very high setting. Watch and listen inside the furnace. There should be some blinking going on at the control board followed by a small blower fan starting up. Then after 10-15 seconds there should be a click followed by an orange glow viewed thru the viewing window to the burner section. In a few seconds the gas valve should click and the burners will ignite. There is a safety switch that will sense flame and then keep the gas going to the burners. If it does not sense it, it will shut it off within 10 seconds. If all is well so far, your blower will turn on in about 90 seconds after flame. There is a diagnostic code chart on the back side of the access door if you get an error code (blinking) on the control board.

Always check little things like air filter, condensate drain and broken or loose wires.

Nov 05, 2008 | Goodman GMS90703BXA Heater

Not finding what you are looking for?
Goodman GMS90703BXA Heater Logo

Related Topics:

146 people viewed this question

Ask a Question

Usually answered in minutes!

Top Goodman Heaters Experts


Level 3 Expert

1751 Answers


Level 3 Expert

1033 Answers

Dan Webster
Dan Webster

Level 3 Expert

8147 Answers

Are you a Goodman Heater Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides