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HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 14622
Experience:  15yrs in the HVAC industry with certificates and degrees.
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I am having an intermittent problem with a/c. Thermostat

Customer Question

I am having an intermittent problem with a/c. Thermostat (Honeywell) gives an E3 and the condenser fan/compressor does not come on. Recent replaced condenser fan motor and capacitor.
Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.

That is a sensor eeprom error, the thermostat is almost always bad when that code comes up.

Customer: replied 1 year ago.
G to know. However, the Thermostat did not behave in this manner until after I replaced the condenser fan motor and capacitor and I am concerned that the problem is related to my install. My original problem was the condenser fan motor bearings went bad, thus the reason I replaced. The new motor is exact specs (RPM etc), but called for a 5uf run cap vs. 7.5uf/old motor. The install was relatively straight forward, only difference was the new motor was a 4 wire. Any chance I have something wrong in the install that is causing this?
Expert:  HVAC Guru replied 1 year ago.

Do you have any sensors connected to your thermostat?

Customer: replied 1 year ago.
no sensors that I am aware, the thermostat is from year 2000
Expert:  HVAC Guru replied 1 year ago.

What is the complete model of the thermostat, I thought this was a newer one.

Customer: replied 1 year ago.
it is a Honeywell t8000
Expert:  HVAC Guru replied 1 year ago.

That is just a defective thermostat, replace it and it has nothing to do with what you did outside..just coincidence.

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