Question about Goodman GMS90703BXA Heater

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Heat strips won't work anymore

Goodman compressor goes into defost cycle ,aux. heat strips won't turn on any more.

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Turn t-stat to emergency heat and see if heat works then if not check circuit breaker if thats ok you may have a bad sequencer or relay

Posted on Jan 06, 2009

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Posted on Jan 02, 2017

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GOODMAN AIR HANDLER, FAN AND HEAT STRIP COME ONLINE WITHOUT DEMAND. WON'T TURN OFF BY TSTAT


the w wire off thermosta controls heat. eithe bad board or thermostat.

Feb 01, 2013 | Goodman Heating & Cooling

2 Answers

I have a large walkin freezer and the compressor and heat strip come on at the sametime, I have to disconnet the compressor when the defrost comes on. Im not sure what wire goes where.


Open following links for 8145-20 wiring diagram and resources:
http://waterheatertimer.org/images/8145-20-wiring-350.jpg
http://waterheatertimer.org/Paragon-timers-and-manuals.html#defrost

8145-20 is 240Volt defrost timer.
Heat strip and compressor should not activate at same time.
As a general rule heater connects to NO terminal 3 and compressor connects to NC terminal 4
NC terminal 3 compressor is on all the time until defrost cycle begins.
NO terminal 4 heat turns on when defrost cycle begins, and at same time NC terminal 3 compressor turns off.
At then end of the defrost cycle, NO terminal heat turns off and NC terminal 3 compressor turns on again.

Jun 29, 2011 | Paragon 8145-20 Defrost Timer

3 Answers

Goodman package- no heat below 30 degrees outside


I believe the unit you are describing is a heat pump. Heat pump are great when the temperature isn't below 30 With low ambient temps. outside it is much more efficient and comfortable to run aux. electric heat from the heat pump.

Jan 03, 2010 | Goodman PHKJ048-1 Air Conditioner

1 Answer

What makes heat change over to aux heat?


depending on how your installer wired it
when you turn the unit on, it could use both to get to temp as quickly as possible
when you are out of balance, the outside temp is lower than 20 degrees, not alowing any heat to be captured by the heat pump
or when your compressor goes inot lockout, but thats a rare wire situation
finally again depending on wire install and t sat as a user option

Oct 17, 2009 | Goodman CLJ30AR32 Air Conditioner

1 Answer

Goodman heats but defrosts turns on before desired temp.


Yes. The defrost cycle of a heat pump is actually turning on your airconditioning to heat up the condenser to thaw it out. During this cycle your electric strip heaters "should" be adequate enough to compensate for the a/c being on. At about 30 - 34 degrees outdoor temp there is not enough heat in the air to to adequately heat your home with the heat pump only. Some technitions will use an outdoor thermostat to turn off the heat pump when it is under 34 degrees outside. If you are to cold when its under 34 degrees intall more electric strip heaters.. But if you do this your electric bill may go up significantly.
Welcome to the wonderful world of electric heat pumps (lol).
Good luck.

Mar 29, 2009 | Goodman GMS90703BXA Heater

2 Answers

Thermostat show AUX HEAT


A heatpump has two sources of heat. One is when the heatpump is operating in normal heat mode, and the other is typically electric heat strips.

The strips come on when the unit is going into defrost, when the unit is not able to keep up with the demand for heat (really cold temps) and when the unit is not working properly.

Whne the strips are on, the T-stat displays "aux-heat" to indicate the strips are in operation.

If the strips are working properly you should have warmer air than with the HP alone. Try switchin it from "heat" to "emergency heat" and see what it will do.

When the HP is not able to keep up with the demand for heat then the heat strips come on, but they typically come on only when the room temp has gotten well below the thermostat setting.

In that situation it would be normal to see indoor temps at 63 degrees when the T-stat is set on 70.

But when you set it to E-heat it bypasses the heatpump operation and goes directly to the heat strips. If they are working properly it should maintain an accurate temp in the home.

Jan 23, 2009 | GE Zoneline AZ55H09D Air Conditioner

1 Answer

Compressor fan not running


Does it look like the coils are frosting over? Is it steaming? Keep watching, after about 30 min does the fan come back on?

If yes to any/all the above then the unit is probably in defrost mode and yes the fan will stop blowing during that time, but restart when the unit goes back into regular heat mode.

During this time you will likely notice warmer heat from the vents than normal and the "AUX or EM HEAT" light will be on.

That is your backup heat system. It should automatically come on during a defrost cycle.

Dec 06, 2008 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Replacing TSTAT for my Goodmans 3 ton heat pump. Only question I have is optimal setting for AUX heat CPH .. I think 5 or 6. ????


5 will be the most economical CPH means cycles per hour . So the thermostat will only let the heat strips come on 5 times a hour. You should not need the aux heat except on the coldest days.

Nov 30, 2008 | Heating & Cooling

2 Answers

MY HEAT PUMP SYSTEM WILL NOT WORK IN EMERGENCY MODE


the thermostat sub base has a place to connect a wire usually white to energize the heat strips when you push the stat way hotter than the house temp. that is why the strips come on in normal heat. it also has a terminal that is only energized in emergency heat and it also should have a wire connected to it so that terminal can supply power to the strips when the stat is switched into emerg heat . you can identify the terminal from the wiring diagram and if need be jumper w2 wire over to the aux terminal and it will work. they both go back into the airhandler and power the same strips. w2..................................................................................................w2 in airhandler to strips or w2...jumper to aux......................................................................................................................w2 in airhandler to strips.

Nov 10, 2008 | Amana PTH123B25AJ Heat Pump Air...

1 Answer

Problem with RSKP 0006 control board


If the unit has an outdoor thermostat, this turns the aux. heat on very cold days. It may need to be replaced, or removed completely, if its kicking over to soon before it gets that cold. If its set to turn on the electric at 30 degrees, then its working the right way. Also, look for different temp. setting on the board you lust installed, there should be some sort of adjustment options on it. Especially if there is no thermostat outside.

Feb 28, 2008 | Amana PTH123B25AJ Heat Pump Air...

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