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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a 1998 unit with a programmable unit and it is stuck

Customer Question

I have a 1998 unit with a programmable unit and it is stuck on "sleep" mode and the A/C will not run. I just had a checked and serviced last week and was working today just fine. Is the sleep mode causing it to not work or do I need to call the service man again? How do I get it out of sleep mode?
Submitted: 2 years ago.
Category: HVAC
Expert:  gotoman for ac replied 2 years ago.
Russ here. Welcome. I am here to help. Please do not rate until you are satisfied with answer. Always available for follow up questions. What model thermostat do you have. Russ
Customer: replied 2 years ago.
I don't know. I can't see a model #. It says energy start programmable thermostat
Expert:  gotoman for ac replied 2 years ago.
Does fan work in on position. Russ
Customer: replied 2 years ago.
no
Customer: replied 2 years ago.
Ok went outside and found a # ***** 5 B D
Customer: replied 2 years ago.
That's the number for the whole unit. I cannot find a # ***** the thermostat
Expert:  gotoman for ac replied 2 years ago.
Ok good. Can you remove front of thermostat and take a small wire and go from R to G to see if fan runs. If it does run. Thermostat is bad. If it does not you have problems with unit. Need to call a service tech. Russ
Customer: replied 2 years ago.
Anything?
Expert:  gotoman for ac replied 2 years ago.
Did you try jumper from R to G on thermostat. Russ
Customer: replied 2 years ago.
Called a repair technician. Had to leave town and was hoping to fix it quickly before with left it with a house sitter. No such luck
Expert:  gotoman for ac replied 2 years ago.
Sometimes there is more to the problem than just the thermostat. If you have a volt meter check voltage between R and C when sub base is removed. Russ

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