Today I performed an evaluation on a 2-year-old heat pump unit upon arrival the outdoor unit was not running checked thermostat it was constantly blinking in the delay reprogrammed the thermostat to be safe and realized it was shutting itself off as a safety feature so I continued outside to locate the 24 volt issue the problem ended up being a failed high pressure sensor bypassed and ran test with indoor thermostat wires jumpered after verifying everything was good replaced the thermostat and verified that it could now control the unit when I was removing my gauges the liquid line Schrader valve started leaking replaced this as a courtesy bundled in with the extended diagnostic and rewire homeowner decided to sign up for the home budget and protection plan covering both units and the membership is to be applied to the MasterCard ending in 0166 left unit running in heat mode thank you for choosing Comfort Experts