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Topic: 1996 original ac roof units no thermostat control on temperatures (Read 1542 times) previous topic - next topic

1996 original ac roof units no thermostat control on temperatures

Lost both thermostats on the roof units. Both works fine on cool or heat but no control over what temperature to go on or off.
I'm assuming there is something in the roof ac that has failed as the thermostats on the wall are okay. One is original and one has been replaced on the thermostats themselves.
Thanks for any help on what is next
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.