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    Heat Pump Relay Maintenance / Replacement

    I hear you. HIGH voltage. The coil needs to be discharged. I have come to understand that the contacts on the relays of a condenser are not made to be burnished. I had the same idea but it is reportedly short term and replacement is in order. I was interested to know if anyone might have used a...
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    Heat Pump Relay Maintenance / Replacement

    2 Q: Question 1: Servicing Carrier Heat Pump 25HNA624 0030020. Infinity thermostat displayed system "malfunction" needs service. Trouble Codes: (all specific to 25HNA6) 75, 76, 77, 78 -- all related to "start voltage not achieved" Not all together. Typically showing 75, 76 one day and 77, 78...
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