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My cARRIER ROF TOP IS SHORT CYCLING IN THE HEAT PHASE

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Have you checked the filters? May be cycling on the high limit due to not enough air going across the burners.

Also what type of thermostat do you have if it's a manuel one then the heat anticipator may be set wrong.

or the air from a register may be hitting trhe thermostat causing it to short cycle.

Posted on Dec 20, 2008

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If you have an ohm meter you can check the compressor windings for opens and shorts. If your compressor is 3 phase as you state (this would be very unusual for a residential unit) you should have continuity across all 3 phases and no continuity to ground. Take the compressor out of the circuit before you check.

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