It is great to have resources like this.
We built our house 3 years ago and installed 2 high performance heat pumps. One for the main floor and 1 for the 2nd floor. Although we have never felt the system upstairs worked great we noticed a month or so ago that the upstairs unit performance seemed to be getting worse. Our electric bill also confirmed this when we used 1000 kWh more electricity than previous year.
We contacted the company that installed the system and they have had someone at our house off and on for over a week trying to diagnose. At first they didn’t figure out what was going on and finally they said it was a faulty valve in the outdoor unit and when they came to replace the valve they said the compressor was bad so they replaced. After they replaced they were testing the supply air temperature and I was here and it seemed like the air was much warmer but after a few days it seems like the air is cooler than it should. What should the temperature be leaving the supply diffusers?
Any other thoughts?
We know the parts, or at least the compressor, is covered under warranty. It has been disappointing to purchase what we thought was a high end unit and have these issues.
Thanks.
Replies
If it was working and slowly quit working again, I'd suspect there's a freon leak.
The best place for this question is hvac-talk.com
make sure you tell them you are a diyer
diyer on hvac-talk, LOL...
What Dan said is likely it, .... to paraphrase hvac-talk comments, the OP's tech was a hack to miss a leak.
I agree with the leak
What does the install company say about your questions? If you have 2 systems, what is the temp coming from the other?
Heat pumps I only know a little but a/c's I've installed and fixed quite a few. With a/c the turn around temp would be good if you could get 20F. Meaning if the room temp is 100F then the cold air from the vent should be 80F. Room temp 90F,vent temp 70F...room temp 80F, vent temp 60F. etc etc
These are just ball park figures because humidity has a bearing plus other factors. It's just to give an quick idea as to what is happening.
1000kw isn't that much of a difference. Lots of things could make a 1000kw in your electric bill.
roger