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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 goodman heat pump and air handler. I put in a comfortnet

Customer Question

I have a goodman heat pump and air handler. I put in a comfortnet CTK02BB control. I keep getting a subsystem Busy message
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.
Hello. My name is ***** ***** I'll do my best to help. Let's get started and see what we can do.What are the model number on the air handler and how do you have thermostat wired?
Customer: replied 1 year ago.
Air Handler MBVC1200AA-1AC with HKR 15c heater. Heat Pump DSZC180361 Wired R C 1 2 From heat pump to air to Thermostat
Expert:  airheatman replied 1 year ago.
Did the thermostat ever identify the air handler and outdoor unit?
Customer: replied 1 year ago.
Yes
Expert:  airheatman replied 1 year ago.
OK so units have been identified, but all we get is "busY"?
Customer: replied 1 year ago.
Yes I Checked for Falts all I get is P3 short heat cycle
Expert:  airheatman replied 1 year ago.
Have you trie a reset o see if this would go away?
Customer: replied 1 year ago.
Have reset all and tried again. same thing
Expert:  airheatman replied 1 year ago.
Not sure on this one.I will open to other experts to see if they have ideas.
Customer: replied 1 year ago.
Heat pump will only do low heat P 1 and then give P3 and go back to on at heat pump

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