No cool master bedroom. Infiniti thermostat was locked out due to outdoor temperature sensor failure. I looked at the sensor and it seem to be OK. No breaks in the wires cycle power and system came on and operating properly. I put it in the test mode second stage come on working just fine. Also blue room had another resettable fault. It was indicating that the thermalProtection inside the furnace was open. This is due to the age of the system. I left literature for Sheldon and Megan to research on Trane heat pumps