Question about GE Zoneline AZ38H12DAD Split System Air Conditioner

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Short cycling My GE Zoneline cycles for approximately 10-15 seconds every 10 minutes or so, even when the unit power switch is in the stop position. No heat is generated , the fan just goes on and off. This is very disturbing in the evening hours. Temp outside is approx. 30, inside temp 60-65. Can I adjust this with the limit switches under the main cover?

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  • hvac_novice Jan 21, 2008

    i have 64 units with ge zoneline heat/ac.all of are different ages.but i have most probs with units installe after 1995.model az21e15d5cv4..specifically.mainly in heat mode they cycle constantly,and seem to bet heat well.

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The most common cause is the fan relay on the main circuit board. However, if the outside temperature is 30degF and the inside is 60-65degF then the cause could be the insulation is ruined or missing on the backside of the unit's firewall. This can cause the unit's internal thermocouple wire to read below 45degF which is the freeze sentinal temp level. Anything below this temp level will cause the unit to come on for a few minutes to warm up the air and bring it to 46degF or higher to protect internal plumbing from freezing.
The best way to check for this is to manually set the unit to one of the heat modes and the thermostat up just until the heater comes on. Let it run until the unit turns itself off. Then set the mode switch back to Off and see if the unit still cycles on and off as before.
If it does then the main circuit board should be replaced unless you are comfortable de-soldering and re-soldering another fan relay in place.

Posted on Jun 23, 2008

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TURN ALL THE SWITCHES DOWN AND TURN THE SECOND TO LAST SWITCH TO THE LEFT UP IF THIS DOSENT FIX IT YOU HAVE A BAD BOARD.GOOD LUCK

Posted on Jan 09, 2008

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If the unit switch is in the stop position and still operating may be there is something wrong with your control. Try to unplug the unit to reset the control error and operate it for testing. But if the symptoms persist please call a qualified technician.

Posted on Dec 30, 2007

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