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Okay I've got a two ton heat pump about 15 years old can't…

Customer Question
Okay I've got a two...
Okay I've got a two ton heat pump about 15 years old can't afford to replace it. I've just recently replaced the board, thermostat wire, the transformer, and the sensor in the back where the coils are. My fan still stays on even when the thermostat is set to off auto or when the green wire is unhooked. Had an incident with a weed eater and when the person hit it didn't let me know and fried almost everything. With my board being new, should I be having trouble of of a relay? I've already replaced the fan control sensor so I know it good.
Submitted: 2 years ago.Category: HVAC
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Answered in 1 minute by:
1/27/2016
HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,356
Experience: Furnace, A/C and heat pump specialist.
Verified

Let me see if I have a manual on the unit.Is air just room temp or slightly warm?

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Customer reply replied 2 years ago
It's warmer than set on the thermostat. The heat works great, the fan just will not cut off unless you manually kill the breaker. The only thing I could think of would be a fan relay but it was replaced with the board, and the sensor (that opens and closes based on the heating elements whether the desired heat is is reached) has been replaced as well. I used to do heating and air before I joined the military but this has be completely baffled.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Looking for a manual. I am wondering if perhaps a stuck sequencer.

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Customer reply replied 2 years ago
Okay, let me know what you come up with because I've tried almost everything I've been able to come up with.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Can you verify model is typed correctly NFCP3600C2

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Customer reply replied 2 years ago
That's it.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK, Got it. Now if there is a heat kit, Can you give me that model,Something like AMFK1oCF or similar?

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Customer reply replied 2 years ago
I'm not with it right now just have pics of the sticker with the model # ***** what it can have in it etc. I do not have the actual kit number in the system. Let me get home and I'll be able to give it to you.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK sounds good. Usually blower is energized through thermostat on Cool and Fan on mode, but through sequencer in heat mode.

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Customer reply replied 2 years ago
Okay, thank you. The kit # ***** ***** Could you give me a part # ***** I could look it up and order it?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Can you take a look in air handler and see if the wires from one of these relays also goes to fan?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago
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Customer reply replied 2 years ago
Okay, I'll order it and get it overnight and get with you when it comes in.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sounds good,Hopefully will solve problem

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