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gunger27

New Member

• Nov 20, 2014

• #1

Since i got her the hevac display had the book and warning sign on it and recently it only worked wen it felt like it . Purchased new 1 from breakers seen workin and all fine before it was taken out plugged it into mine and same problem . Is there any tips on a quick fix or does it need a full diagnostic

 

wammers

No longer with us, RIP

Donater

• Nov 20, 2014

• #2

Diagnostics. Usually a blend or distribution motor problem. Depends what it is doing as to which.

 

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gunger27

New Member

• Nov 20, 2014

• #3

Its another 1 that works wen it feels like it . Evry now and then on start up book and warning sign are gone it all woks fine blows hot and cold

 

wammers

No longer with us, RIP

Donater

• Nov 20, 2014

• #4

gunger27 said:

Its another 1 that works wen it feels like it . Evry now and then on start up book and warning sign are gone it all woks fine blows hot and cold

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Each time car is started Hevac does a self check, cycles motors from and back to their selected positions. Fault sign will come up if one does not get to it's set point for any reason. As heater gets hot things free off so next time you start car all is good. Try cycling the flaps manually via the selector buttons to exercise them. May help a bit.

 

Datatek

Well-Known Member

• Nov 20, 2014

• #5

Nothing wrong with the HEVAC unit, as Wammers said, most likely it's just reporting a blend motor failure. Expensive way of fault finding chucking new bits at it without knowing what the problem is.

 

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gunger27

New Member

• Nov 20, 2014

• #6

Will try that thanks guys

 

Hairy

New Member

• Nov 20, 2014

• #7

I have same sort of thing with mine, im sure its the blend motors as cant direct air flow but can get hot and cold on drivers side but not the other side so it can wait till the new year now as gets hot inside so in no rush.:5bdriving:

 

wammers

No longer with us, RIP

Donater

• Nov 20, 2014

• #8

Hairy said:

I have same sort of thing with mine, im sure its the blend motors as cant direct air flow but can get hot and cold on drivers side but not the other side so it can wait till the new year now as gets hot inside so in no rush.:5bdriving:

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N/S blend motor duff, O/S blend motor Ok. Distribution motor (Upper one R/H side of heater) either duff or flaps seized (common fault) Distribution motor has a lot more work to do than the other two.

 

Hairy

New Member

• Nov 21, 2014

• #9

wammers said:

N/S blend motor duff, O/S blend motor Ok. Distribution motor (Upper one R/H side of heater) either duff or flaps seized (common fault) Distribution motor has a lot more work to do than the other two.

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Thanks Wammers, thought thats wot it might be so got some blend motors ready for when i get round doing it, got most of the other jobs done now and she is running and handling great so taking a break now as moved house and got a garage with a pit in it now.