P38A Hevac

cornishboater · Oct 22, 2019

Just a little one here, now that winter is on its way I have been trying out the heating after replacing motors/sensors etc. No page fault any more now and all is working well. However, when the hvac is on auto whenever I adjust the temp on the right the auto goes off. It comes on as soon as you press the button but goes off as soon as you adjust the temp. This doesn’t occur on the left, the heat/cold work fine and there are no faults registering on the Nano. Any ideas? Not really a huge issue just another one of those little annoyances!
Cheers

Dopey · Oct 22, 2019

pull that switch out and give it all a good clean, sees like something might be stuck, or the contacts that turn it off and on

cornishboater · Oct 22, 2019

Just seems odd as the temp switch responds even with the lightest touch, I would have thought that if the contacts were iffy it would not respond so well. Just looking into it it seems to happen when adjusting above 25c. I got this rebuilt hevac head from Marty a while back so I don’t think it can be anything serious. As I say, just an annoyance rather than a problem, just wondered if anyone else has had the issue. I have done the “tinternet” bit but haven’t found anything similar.

RangeRoller dt · Oct 22, 2019

It’s on auto - pressing anything cancels auto mode - as pressing anything is a manual input

(ie not auto)
Simples

cornishboater · Oct 22, 2019

The left one you can adjust the temp and it stays in auto mode, the right one adjusts up to 24/25 then cancels the auto. It always use to remain in auto mode until you reached hi or lo

RangeRoller dt · Oct 22, 2019

The drivers side overrides the pass side I think, it’s in the manual somewhere

cornishboater · Oct 22, 2019

It’s a bit weird then as it has only just started to do this, always stayed on auto until hi or lo was reached.

Datatek · Oct 23, 2019

I never use Auto mode, but as far as I know as has been said, any manual input cancels the Auto mode.

wammers · Oct 23, 2019

The temps passenger side are set more than 6 degrees higher or lower than the drivers side The Hevac automatic will not work.

cornishboater · Oct 23, 2019

Not sure why but all is back to normal now, the auto stays on when adjusting temps! Go figure, a self fixing fault..... (for now)

P38A Hevac

cornishboater

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Dopey

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cornishboater

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RangeRoller dt

Well-Sprung Member

cornishboater

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RangeRoller dt

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cornishboater

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Datatek

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wammers

No longer with us, RIP

cornishboater

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