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BillyHvac
BillyHvac, Journeyman HVAC Tech
Category: HVAC
Satisfied Customers: 22096
Experience:  Endorsed for unlimited heating, cooling, oil burners, boilers, refrigeration, hydronics
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I have a th9421c1004 stat working off a thm5421 interface

Customer Question

I have a th9421c1004 stat working off a thm5421 interface t-state screen goes blank, reset power and screen comes back on everything will work ok then no condensate pump green lite flashes on interface d14 about every 45 sec any suggestions
Submitted: 4 months ago.
Category: HVAC
Expert:  BillyHvac replied 4 months ago.
I am very sorry your question has not been picked up yet.I just logged on and found you had not been assisted. Please let me know if you still need help and I will do my best. Please do not "Rate" as we have not worked toward an answer yet. If you would like to proceed let me know by replying