I'm hoping this is the right forum... I didn't see a forum for HVAC
, and this seemed to be the best place.
I'm having a HVAC
issue that I could use some advice on. All 3 of my AC's were serviced in August. (general maintenance
, including topping off freon where necessary) The service
man said that I needed to flush the AC in the master hull
as it was freezing up, and he attributed that to "gunk" building up in the pipes. I flushed the system after his visit in August. It seemed to be running just fine.
Now that it is colder, I've been turning on the heat at night. Everything starts out fine. Nice hot air flowing out. Then after about 10 minutes or so, it stops blowing hot air. For reference, thermometer set to 70... room temp 66, and it stops heating
The things I've checked are:
1. no obstruction in the thru-hull. Water
is flowing in just fine.
is flowing out of the boat
in a nice steady stream
4. Filter has been cleaned
is getting hot, and coil are condensing... until it stops heating
6. coils are NOT icing up
7. there is nothing obstructing the vents that would prevent room air from getting to the unit.
8. I've checked that the control panel
is in the heat position... temp set properly... and fan is on
9. I also reflushed the AC just incase I didn't get all the gunk out the first time.
What more can I check? My instinct is that it may be a faulty control panel
, but it seems to work
fine on the cool setting.
One other point, I have seen an error message come up sporadically that indicates "high pressure" (error code HI/PS) That's what lead me to think that it might be an obstruction, or gunk still built up.
I have a Cruiseair AC with a Cruisair
Q-Logic Direct Expansion Control System..
Anyone have any ideas what else I could check?