Question about GE Zoneline AZ38H12DAD Split System Air Conditioner

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How do you get the external thermostat to control the unit

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What is it doing now? If it works but not well it could be the postioning of the thermostat. Air flow around it must be plentiful and unobstructed. Ensure thermostat is connected to unit correctly. Using a power meter, check that you are getting power to the thermostat AND it is going back to the unit. Doesn't work if it does not send power back.

Posted on Apr 23, 2013


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2002 4 ton Bryant air conditioner shuts off, fan still runs but not cooling is problem in the controls in the attic or in the AC unit or both?

With a non heat pump it is a simple 24 volt AC control circuit. In the attic there is a relay that is actuated via the fan control wire directly from the thermostat. On the thermostat there is an auto/man switch that controls the fan. Manual the fan runs all the time. Auto fan turns on and off with the outside compressor.

If the system is not calling for cool and the fan continues to run the fan relay is sticking. common problem. Sometimes after running for several days the relay will stop sticking if not, replace relay.

If the system is calling for cool and the compressor stops I would still expect the fan to run until thermostat tells the A/C to off. Some compressor units include a safety switch or high-pressure cut-out switch A blocked internal valve bad control board or external fan in outside unit defective no air flow in outside unit.
High pressure cut out not good,

Suggest turning temp max cool and observe. If acceptable cool and the compressor runs without interruption all is good, except for the blower in the attic. Safely check relay in attic blower circuit.

Hope this helps.



Jun 28, 2017 | Bryant Heating & Cooling

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Got a garrison heater with red light on but got no heat

Glenn, Do you run the unit separately, or connect it to an external thermostat? Please check the knob on the unit's control panel and see what the target temperature is. If it targets at low temperature, turn it to a higher one, then you will get the desired temperature.

Dec 16, 2015 | Heating & Cooling

1 Answer

Can't fined the proper setting for the freezer dial?

Almost all freezer controls are manufactured to control temperature to the proper temperature control if you rotate CCW , notice the position and then rotate CW, notice the position and then go the the mid position. If temperature is not maintaining the required temperature, you may need a new temperature control thermostat installed. Before you replace the thermostat, check to make sure you have not overloaded the freezer compartment and, If you have an external condensing coil, that it is lint/dust free. Often times people seldom clean the external condensing unit and causes the loss of freezer temperature control. It is important to keep the condensing coil clean because that is where the heat is rejected to the surrounding air. Hope this helps.

Sep 25, 2014 | Cars & Trucks

1 Answer

How to wire a motorcontroller to a commercial A/C split unit

you'll have to be more specific in what you are attempting. Split systems are common place, but some are 220 vac some are 110 vac, some have remote controls, etc etc etc.... some have integral thermostats on the indoor unit, some do not and need an external thermostat, exactly what are you calling a 'motorcontroller'?

Jul 04, 2014 | Heating & Cooling

2 Answers

Hunter 44665

You can get the manual at:

Normally these thermostats read remote temperatures but do not use them for control. The external remote sensor is normally put outside in our area yeilding an inside out side thermometer.

Nov 22, 2013 | Hunter Fan Company 5/1/1 Programmable...

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Check the thermostat, the sendor the control or the relay unit.
You must trace from the sensor to the control unit , check at the point of running and stop the change in voltage to confirm.
The control unit can be trigggered externally to test. If so the sensor can be the suspect.

Sep 03, 2010 | Amcor ALD12000EH Air Conditioner

1 Answer

Inside unit running outside want come on temp on

check circuit breaker in house panel labeled a/c or outdoor unit
check box near outdoor unit for a breaker or fuses
some thermostats have a 5 min delay when switched to a/c
check for external reset buttons at outdoor unit some are red depending on brand
check that all wires are intact at outdoor unit------none cut or hanging and not hooked to anything?

Jun 19, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Coleman gas H/A not shutting off

Yes and No. Sawdust even when in get in internal parts will not cause the problems that you are experiencing. More than likely your sencondary thermostatic control for the condensor is not set at proper settings to work proficiently with external thermostat.

Aug 21, 2008 | Heating & Cooling

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These units are only made with a built in themostat and controls only. You cannot purchase an external thermostat or remote for this unit. Sorry...

Dec 16, 2007 | Procom ML300TBA Heater

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