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Old 02-17-2019, 08:03 AM   #4
ChuckS
Montana Master
 
Join Date: Dec 2017
Location: Mountain Home
Posts: 831
M.O.C. #20949
I’d have to be checking the wire connections to the thermostat. Sounds like DC power wire to thermostat is loose ... if not the only other issue that would cause loss of display is intermittent beak on circuit board of thermostat. Cycling of AC compressor or delay start due to head pressure not going to cause display t9 totally turn off
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