Found old thermostat wire chaffed, continuous 24v was supplied to Y2, engaging the indoor blower motor to operate non stop but the 2nd stage on the compressor did not come on. No voltage was supplied on Y1. Replaced thermostat wire from the thermostat to the current spliced section of the other new thermostat wire that was installed by the unit to eliminate thermostat wires out the challenge, and also pulled out the pinched thermostat wire area from underneath the hood. After replacing the thermostat wire, tech attempted to put on the previous Trane 824 thermostat to test out system operation. Blower turns on and off as it should, but system was on,y receiving 24v on Y1 for 2 seconds then No voltage was supplied. Tech replaced the Trane 824 thermostat with a new one and upon start up, tech noticed that the Trane thermostat randomly reset. No cooling challenge was still present, thermostat was dropping voltage for the compressor. Tech swapped out the Trane thermostat with another Honey