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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a 6.595.430 or D509.151 HP thermostat that all of a

Customer Question

i have a 6.595.430 or D509.151 HP thermostat that all of a sudden two weeks ago is stuck on HOLD with hour and date and will not release it to allow me to change the temperature. Can you help me?
thanks.
Bonnine
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.
Is this a battery unit or hardwired to power?

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