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Heating, Air Conditioning, Fridge, HVAC/Compressor Works Only if Thermostat Clicks On


I have a split central AC unit here in S. Florida.
Strange problem: The compressor only kicks on if the thermostat "clicks" when it turns on. If the thermostat clicks it runs fine. If it doesn't click, the outside fan will rotate as it should but the compressor won't turn on.
Is this a thermostat problem or something in the condenser like a contactor or capacitor?
Thank you for your time and the help you give.

You can remove the wires at the thermostat or jumper R terminal to Y that should bring on the outdoor fan and compressor ( you may or may not have upwards of  5 minute time delay before it starts.)  Your blower fan may come on also. Do this several times letting it run for upwards of a minute, waiting 5 minutes in between to let refrigerant pressures to equalize before retrying .If the outdoor unit starts and runs fine each time then I would concentrate on the thermostat, if you still have problems you need to concentrate on the outdoor unit,  

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40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.


Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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