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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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)

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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 system.now 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

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3-5 ACCESS TO THE BLOWER WHEEL OR THERMOSTATS

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.

3-6 TEMPERATURE CONTROLS AND HI-TEMP SAFETIES

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.

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WONT HEAT. BLOWER COMES ON BUT NO HEAT. IT HAS NO


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.

hardrocko

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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.

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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.

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He probably changes the heater core or checks to see if the heater core is circulating the coolant through. If the blower is not working he will check the Resistor and plug near the heater blower under the dash. Both are under the dash. have you replaced the thermostat ? If you do, after refilling with coolant, bleed the sysytem using the bleeding screw at the outlet of the thermostat until only coolant comes out.

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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.

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