Sometimes compressor would not restart until some time later. Refrigerant pressure level checked OK. Air handler recently replaced. Solution: OK The problem was fixed. Let me back track a bit. The outside condensing unit was replaced by an authorized Carrier dealer 2 years ago. The inside evaporator or air handler was replaced a year later by the same dealer. The problem developed only AFTER the air handler was replaced. The problem turned out to be that sometimes the system pressure was not equalized during the off cycle because the new air handler used a thermostatic expansion valve. They did put in a cheap thermistor to help the run capacitor the first time they came out, but it did not help. Then they installed a switch which activated the reversing valve every time the thermostat was satisfied or when compressor shut down. After the switch was installed, the compressor started everytime. After isolating the problem, a good hard start kit with a separate potential relay and start capacitor was ordered from Carrier and installed. I also asked them to remove the switch after the start kit was installed. So far the compressor started every time without problem. I found some good information on this issue on this website toad.net . Following is a quote from the website: "Any refrigeration system that uses a TEV (thermostatic expansion valve) instead of a capillary tube or orifice must have a start capacitor because the system pressure may not equalize for a period of time ...
Tags: Carrier, sean, 2410
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