Heat pump won't stop heating; fan won't turn off

[Kirochka66]

My home was built in 2000. Last week, I had a service tech come out because my auxiliary heat was not working (aux light stayed on constantly, but system blew cool air. The heat pump itself was working as hard as it could, but couldn't quite keep up). I was told that the sequencer was stuck open. The tech "broke loose the contacts and rewired sequencer". The system worked fine for a week.

Now, my heat pump does not want to turn off. It was set at 70, but was up to 76 yesterday and still going strong, so I turned the whole system off at about 6PM. The fan has now been blowing for 18+ hours, and somehow, despite freezing temperatures outside, the inside temp is still at 75, and the air out of the vents is toasty.

Something is not right!!

I am loathe to call out the service guy again until I have a better understanding of what's going on. (I don't want to be taken for a ride on the repairs.) Can this problem be related to the original one? Not to whine, but I can't afford a series of repair bills.

Any help would be appreciated. Thanks.

[Ed Imeduc]

The tech "broke loose the contacts and rewired sequencer". The system worked fine for a week.

Just what he did I have no idea here. but if you say you have heat and the blower is not running Im think that the strip heater can be on. Turn the tstat to blower on see if you get blower and heat ???? Id call him back for sure to fix it .What he did could have did this. He should have fixed it the first time not rewire anything in there.


ED :wall:

[scottg]

Call the company and tell the guy to come back out because now it sounds like the sequencer is stuck closed now. He should have replaced it the first time out. Although the blower relay could be shorted and energizing the blower and heaters at the same time. That is what he could have tried to rewire to make it work. Either way the guy needs to come back with a sequencer and blower relay. Test them and replace what is nessesary. Ask to see the part and have him test them when you are present. Sequencers are normally an open switch on the top switches and the bottom terminals will have some resistance and may show up on a meter. The blower relay is normally open and normally closed to common. Terminals 4 to 5 normally closed and terminals 2 to 4 normally open. Plus a coil that has some resistance these terminals are usually 1 and 3. ;)