Heat pump problem

[2ndGenToyotaFan]

Not major, but the fan in my air handler will not shut off.... unless you cut the power....

I think I have narrowed the problem down to the sequence relay (As that seems to control the fan on the ground side). I'm thinking that the contacts are either welded together, or the 24V coil isn't moving them anymore.... because there was no change when I pulled the 24V control wife off, or when I hot wired the 24V contacts.

Any HVAC guys out there? Does this sound like I'm on the right track?

The relay in question.... The fan ground goes into the #1 post. #1 and #2 are stuck together inside, it seems....

 

[FJ40_owner]

Not major, but the fan in my air handler will not shut off.... unless you cut the power....

I think I have narrowed the problem down to the sequence relay (As that seems to control the fan on the ground side). I'm thinking that the contacts are either welded together, or the 24V coil isn't moving them anymore.... because there was no change when I pulled the 24V control wife off, or when I hot wired the 24V contacts.

Any HVAC guys out there? Does this sound like I'm on the right track?

The relay in question.... The fan ground goes into the #1 post. #1 and #2 are stuck together inside, it seems....

Pull the fan wires off and Ohm the contacts. Fan relays burn shut all the time. Might want to measure the start up Amp draw of the fan to verify your control relay is sized properly.

JB

 

[Trollhole]

You have got it out replace it anyway. Should only be around $10 dollars. While your in there you might as well replace the 24v coil. Also while your at the HVAC store buy a new outside contactor. $10 dollars also. 30min of work and a piece of mind knowing that those parts won't fail for a long time.

 

[2ndGenToyotaFan]

Thanks guys, I'll just replace it... I hate going under the house.... The coil is less than a year old. What is the outside contactor? And how do I find it? I'm electricaly savy, but new to heat pumps.

 

[Trollhole]

If it's less than a year old don't replace it. Contactor is what basically switches the 240 volts on on your outside unit. Not hard to replace. But not needed if your only saying it is a year old. On units that are older than 10years I will usually replace.