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Old 20-05-2024, 08:06   #1
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Join Date: May 2024
Location: St. Petersburg, FL
Boat: 2001 Hunter 340
Posts: 20
HPF showing once setting temp reached.

I was running my Dometic AC this weekend with no problems. Solid water flow out the side, nice cold air blowing inside.

Temp got down to about 77 and I decided it was cool enough. I set the thermostat to 77. A minute or so later the system flashed HPF. Decided to turn the unit off while I looked up that code. I turned off the AC at the control panel/thermostat but the equipment still kept running. I turned it off at the circuit panel.

After looking up the error code and getting some "what might be wrong if you get an HPF error" advice I checked a few things.
- Good discharge outside so Pump is good.
- Main motor not getting hot.

I set the temp back down to 73. Unit turned on, blew cold air inside and a solid stream outside.

Turned it back up to 77 (room temp) and HPF came back on.

One video/advice site said it might be the HPF sensor. Didn't have the tools to test that yesterday.

Any thoughts?
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