Honeywell T4 thermostat troubleshooting

Today we replaced a T4 honeywell thermostat that was energizing the reversing valve in the heating mode.

Check out this Video too

Thermostat Wiring and Low Voltage Basics
In this video we learn how to program our thermostats using installation instructions.
Low voltage wiring connections and how to identify.
Where 24 V power comes from.
Different types of thermostats that I use in the residential field.
https://youtu.be/7zNIpRvrWT0

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