Question about Goodman CLQ36AR49 Air Conditioner

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Defrost board contacts in relay chater and do not let defrost

Added new board does the same thing. changed the tstat and checked the wiring still nothing. defrost tstat closed i just can't thing about a nother cause?

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  • Danny Clark
    Danny Clark May 11, 2010

    What is the original problem?

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Is sensor at proper location? try turning sensor ? Ohm sensor as you turn it.

Posted on Jan 16, 2009

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Condenser unit will not run. has 240 volt at contactor, but no 24 volt control power to coil. Control Transformer has 24 volt output. Blower will run but condenser unit does not operate.


Hello, check the tstat wiring going to the unit for any breaks in or if it has come loose between the indoor unit and outdoor unit. Also, chevk if you are getting voltage from tje control board between the y and c terminal, if not the control board is bad. Last thing to check is remove tstat and jump the y and r wires there if this starts the unit then you have a bad tstat.

Apr 30, 2011 | Ruud UBHC Air Conditioner

1 Answer

Defrost problem folowup


bmurf, This adaptive defrost determined by compressor run time between defrost cycles. It could go up to 96 hours before defrost depending on differnt variables. With the unit running, a good frost on the evaportator and the tstat covered with frost or ice, unplug the refer. Pull the connector off the adaptive defrost board. On the harness, ohm from red to white/black stripe. If your tstat is good, you should read less than one ohm continuity. If it's bad, you probably will read around 240K ohms. This is the resistance of the resistor built into the tstat. On the live checks, plug in the refer. You are going to have 120VAC from Red to white. You also want to see 120V from white to white/black stripe. If you have that, the tstat is closed. If you have less than 120, say 96,100V. on white to red, that means you are dropping power through the 240K resistor built into the tstat. The board senses the tstat is open and no need to defrost. I hope this helps you out cat, thanks for the kind words on your post. Good luck, Catriver

Jul 25, 2007 | Maytag MSD2756G Side by Side Refrigerator

1 Answer

3 ton carrier split unit heat&cool,mod#38QH036300DL, Heat is good, thermostat will not shut it off. only way to shut the inside unit off is turn off the circuit breaker


Sounds like a bad tstat. The Tstat does control the on and off of the unit.
You can check the Tstat by taking off the white wire to the tstat and turning the heat to the on position and if it still comes on you have a bad wire. If it does not come on then you have a bad tstat.
Another option is to open the furnace and look inside at the control wires and follow them back to ensure that they are not shorted together anywhere inside the unit before checking the tstat wires.
If its the control wires then follow option 1 if not follow option 2.
1.Normally people who run tstat wire pull more wires than necessary to the tstat. Because of this you can use a different one for the heat which is white on the tstat. Remember that if you use another color on this then you need to change it on the inside unit as well. Otherwise it will not work. In other words change it on one end of the line you have to change it on the other to make it work.
To check the tstat wires, use continuity. Take all the wires off the tstat and the inside unit. These are the small control wires, not the main 110 wires. Check each one against each other to see if any of them are shorted together. Be sure to write down the wire colors and the terminals that they belong to on both sides before you take them off otherwise you will have big problems...
If you do not have another wire then pulling a new wire will be the next option.

2. If this does not solve it, then its the TSTAT, Replace it. Hope this helps.

Jan 28, 2011 | Heating & Cooling

1 Answer

Frigidaire side by side - replaced defrost timer. defrosts as should for a few days and then the evap freezes up. After advancing the timer to defrost cycle and powering off and on it will defrost properly...


Good day,
Sounds like a bad timer to me. Forget the tstat. Power comes from the power cord and goes directly to the tstat. The tstat sends the power to the timer where it is directed to either the compressor or defrost heaters as needed.
Recheck your plug connector to the timer carefully. I have installed many timers that did not work, or work right, right out of the box.
As well, to cover yourself, I would replace the defrost tstat which is located behind the rear panel in the freezer compartment.
It's a small round disk clipped to the top of the cooling coil, and is the component that is by far, the component that fails most often.
Check the connections to the main heater as well, while your in there.
The defrost tstat looks like this.
dd80879.jpg

Aug 17, 2010 | Frigidaire Refrigerators

1 Answer

Unit continues to run in emergency heat when shut off.


If you turn tstat off does it still run. If so you have sequencer stuck. Replace sequencer. Also you may ahve abad defrost board out side. When a unit goes into defrost it will bring on heat so you will not get a blast of cold air. Sometimes the defrost board sticks and keps the heat on. Disconnect white wire at outside unit to break circiut. If hat goes off bad defrost board. You can change that yourself. Keep in touch Rus

Dec 08, 2009 | Goodman CPLE24-1 Air Conditioner

1 Answer

My compressor takes about 30 minutes to kick on in my house


that seems like too long at most delays and lock outs that are built into a system throught the tstat and the outdoor systems defrost board should only take about ten minutes. at most twenty if you had a dual fuel system. (heat pump outside and gas furnace inside). check the installer programming on your tstat may have a compressor lock out set too long for some reason.that or possible bad lowvoltage connections or maybe ants in you contacts at compressor outside. could be many things

Sep 11, 2009 | Goodman CKL36AR36 Air Conditioner

1 Answer

Motor good and not running possibly bad relay


hey there, it seems you know a little about the troubleshootig. The first thing you need to do is see if the rela is trying to energize by checking for 24v accross the coil while it should be running. I am guessing that with a 1/8 hp this is the condenser fan motor (outside). If you are not getting 24v at the coil is your compressor coming on? You may have a safety switch with a manual reset (usually red button) on the piping under the fan motor or just a broken wire. If this is a heat pump and the relay is located on the circuit board and the compressor is coming on,chances are the board is bad. If you only have 2 stat wires coming into the unit, check for 24v on them wait for any time delays. If it is there and at the coil replace the relay. If the 24v is not outside at all, check iside or try different collor wires, one may be broken. If still no 24v, take the tstat off the wall, turn off both units to kill power, twist the wires from terminals G, Y and R together. This should bring it on. If this is the only way to bring it on, replace the tstat. Also, there may be a float switch in a condensate pan somewhere on the indoor unit. If the pan is filled with water, it will either kill the whole 24v circuit or just keep the outdoor from coming on. Let me know what you find
seth

Jul 31, 2009 | Carrier 38BRC048 Air Conditioner

1 Answer

I have a Rudd ubha and have been using the emergency heat for a couple weeks because the aux. heat won't work. Now I need the A.C. but the unit outside won't turn on. We replaced the control panal and it...


Did you replace the defrost board out in the outside unit? Or did you replace the control board just on the airhandler? You need to check if the board outside is functioning. Also, put the unit in cool and check to see if the outside unit is being called to come on. What could of happened is the unit was the compressor went out and that's why it didn't work in Aux. and only in emergency. I would just recommend checking the outside for issues since the inside unit is operating in emer. It could possibly be the tstat also. Just buy a tstat for a heat pump and follow the instructions. The key is to label your wires with what color is going to what terminal (r,w,g,o,y etc...) and then use the new tstat instructions. Better yet, buy the same brand t-stat. Hope this helps.

Apr 04, 2009 | Ruud UBHC Air Conditioner

1 Answer

Frigerator runs constanly till compresser gets to hot


Sounds like it might be the thermostat
sensor bulb is defective see if you can
turn the refrigerator off with the thermostat
the defrost heater is supposed to heat up
enough to open the defrost thermostat

Make sure the defrost timer works to
turn on lhe heater & turn off the defrost tstat
turn the power off and check the tstat & defrost
heater for continuity check to see if tstat open
and closes when you turn the knob,

if you remove the tstat you can check the
bulb in ice water and warm water aborv 40
to see if tstat cycles on and off

Nov 26, 2007 | Maytag MSD2650H Side by Side Refrigerator

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