Question about Goodman GMS90703BXA Heater

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Blower comes on but no heat

THe thermostat was replaced when the heater would not come on, but after that the heater would still not come on

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If there is a problem with the furnace, it will display a number of blinks on the circuit board. You will need to look thru a small window because if you take off the access door, it removes power from the furnace and erases the code. Once you count the number of blinks, now remove the access door and on the reverse side you should find a diagnostic error code chart to get you started looking in the right direction. If there are no blinks, it means that the thermostat is not sending a signal to the furnace to start (check the thermostat for proper operation and wiring).

I hope this helps.

Posted on Nov 11, 2008


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Posted on Jan 02, 2017


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When my unit comes on the ac blower and furnace fan come at the same time we replaced the unit and thermostat and probaly wired it wrong need wireing diagram

Yes you probably did. First question: Why did you replace thermostat? (This will give us a better clue as to what is actually wrong since thermostat is rarely the problem.) You'll have to give us more info. What brand and model thermostat, furnace and ac do you have. How many conductors (wires) are at thermostat location? And what color are they? Also make sure that the thermostat is set to either gas electric or heat pump. Model numbers will tell us. Another possibility is that there's a short in your wiring.

Jan 15, 2018 | Heating & Cooling

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Heater core and blower is not working but still no heat what is the problem

If you have no heat coming to the heater core, your thermostat may need to be replaced. If the engine does not get hot enough it will not open to let water into heater core. This will keep blower from coming on if you have climate control.(about $10) - check your fuses also - if the blower resister needs to be replaced it will keep blower from coming on. It is on the firewall right behind engine on passenger side ( $45 at auto zone). - If you have climate control the panel may need to be replaced. I would check this last because it is almost $1000 new. Get a replacement at junk yard ( I paid $75)

Feb 28, 2015 | 2004 Mercury Grand Marquis

2 Answers

My heater worked a little bit today when I had the thermostat changed but notice the fan wasn't working and that's why it did not heat the cabin. Now I notice the air compressor is coming on while the

well the ac compressor will come on if you have it in defrost mode,if heater is blowing cold ,after you just had thermostat replace ,you could possibly have air in if your heater motor is not working which is called the blower motor under dash it could be the resistor that controls it also these rigs have been known for wire harness problems at heater control unit and the blower motor connector.good luck,mike

Jan 17, 2015 | 2002 Jeep Liberty

1 Answer

Just replaced water pump and thermostat in 2003 audio Quattro 1.8 no heat

Airbound more than likely..if not then check flap motors on heater box.

Dec 12, 2013 | 2003 Audi A4 Cabriolet

1 Answer

Electric dryer getting way too hot



To get to the blower wheel, remove the back of the dryer.

The blower wheel is under the bottom of the lint screen duct to your left, as you look at the back of the dryer.

The operating thermostats are at the blower wheel outlet.

In electric models, the hi-temperature cutout thermostat is mounted to the heat riser.


These clothes dryer machines use operating thermostats to control the temperature inside the drum, and hi-limit thermostats to prevent overheating of the dryer drum.. Many machines also have extra temperature controls, such as bias thermostats and heaters, hi-temperature cutoffs, and thermal fuses.

Bias thermostats are just like regular operating thermostats, except that they are mounted inside a bias heater. When the bias heater is energized, it generates a small amount of heat, which causes the operating thermostat to open sooner, keeping the dryer drum cooler inside. Thus a bias heater allows a single operating thermostat to act like both a hi-temp and a lo-temp operating thermostat.

A thermal fuse is found on the blower outlet, right next to the operating thermostat(s.) This fuse will blow when too high a temperature is sensed at the outlet; usually when one of the operating thermostats has failed. If it blows, the motor may not start, or you may get no heat (no voltage to the burner.)

A thermal cut-off is mounted on the clothes dryer heater box. It is a back-up for the hi-limit thermostat. Whenever you replace it, you should replace the hi-limit thermostat, too. A high-temperature condition causes it to open, an overheated grounded heat element may also cause it to open.

Dec 01, 2013 | Kenmore Elite HE4 Electric Dryer

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I'm assuming that this is a portable heater. If not let me know. If it is it sounds like the heating coil is bad or the relay which turns on the heat is not working. TU probably means turn up the thermostat. I guess you could try that but it seems pretty obvious. Let me know how you make out.


Feb 10, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

No heat, but blower works, have new thermostat,and clean filters, how come no heat , it's a heil blower unit # nba30245kA1

A couple things come to mind. Your overload could have tripped,or the fuse for you heater could be bad.

Jan 07, 2010 | Heating & Cooling

1 Answer

Rheem RHQA Heater:Blower works but no heat.

Is there a setting on the thermostat for Auto or Fan? If so, make sure it is in the Auto setting. You will have a contactor that turns on the elements and a relay for the fan. Follow the wiring diagram to see which relay energizes the fan then unplug it to see if the fan stops.

Nov 02, 2009 | Heating & Cooling

1 Answer

No heat in vehicle

The first thing i'd do is replace the engine thermostat. It sounds like the thermostat is not opening allowing the hot coolant to circulate through the heater core, therefore no heat from heater.

Oct 03, 2008 | 1987 GMC Jimmy

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