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Omega Owners Forum › Omega Help › Omega General Help › Fans on constantly

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Fans on constantly (Read 534 times)

JamesV6CDX Omega Baron Offline Posts: 3202 Gloucestershire Gender: Drives: 2002 (02) 3.2 Retail MV6 in Star Silver with Leather	Fans on constantly 10. Feb 2010 at 13:46 Hi Guys My front rad fans are on constantly - at full chat. They only go off when the climate is switched off, (or to eco). I'm presuming their speed is temperature controlled? Last night, I did a 30 mile run and the top hose only just felt luke warm. I turned the fans off, and it soon heated up. Any pointers?
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Kevin Wood

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Re: Fans on constantly
Reply #1 - 10. Feb 2010 at 14:17

Sounds like it could be a stuck fan switch, air con pressure switch or a duff relay. Do the fans behave normally without the climate on? I.E. stay off until temperature into the 90's then come on first stage?

What is the engine running temperature? Top hose temperature shouldn't be dependant on fans, TBH (bottom hose is a different matter).

Kevin

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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Fans on constantly Reply #2 - 10. Feb 2010 at 14:33 Front fans should be on when ever the aircon operates
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JamesV6CDX Omega Baron Offline Posts: 3202 Gloucestershire Gender: Drives: 2002 (02) 3.2 Retail MV6 in Star Silver with Leather	Re: Fans on constantly Reply #3 - 10. Feb 2010 at 14:36 Marks DTM Calib wrote on 10. Feb 2010 at 14:33: Front fans should be on when ever the aircon operates It appears all the fans are on mark - incl the rear rad one? (even first thing on a cold morning) when the aircon is on.
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Bionic Senior Member Offline Why drive anything else? Posts: 812 Leicester Gender: Drives: 1999 Omega Elite 3.0 petrol 4 speed auto	Re: Fans on constantly Reply #4 - 10. Feb 2010 at 15:05 3 fans on mine. two in front are on when the aircon/climate is on and the single rear one is temp switch controlled by coolant temp. GudLuk
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Kevin Wood

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Re: Fans on constantly
Reply #5 - 10. Feb 2010 at 15:28

JamesV6CDX wrote on 10. Feb 2010 at 14:36:

Marks DTM Calib wrote on 10. Feb 2010 at 14:33:

Front fans should be on when ever the aircon operates

It appears all the fans are on mark - incl the rear rad one? (even first thing on a cold morning) when the aircon is on. Undecided

Sounds like the second stage aircon switch is shorted if they are all on flat out (as opposed to just the front two at half speed, which is normal, as said).

Kevin

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JamesV6CDX Omega Baron Offline Posts: 3202 Gloucestershire Gender: Drives: 2002 (02) 3.2 Retail MV6 in Star Silver with Leather	Re: Fans on constantly Reply #6 - 10. Feb 2010 at 15:33 Where is that located Kev, any idea?
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Kevin Wood Global Moderator Admin Team Offline Posts: 20377 Alton, Hampshire Gender: Drives: 3.2 MV6 (LPG), Westfield	Re: Fans on constantly Reply #7 - 10. Feb 2010 at 17:21 JamesV6CDX wrote on 10. Feb 2010 at 15:33: Where is that located Kev, any idea? Don't know off the top of my head. I'll have a look later. Kevin
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ians Omega Baron Offline Posts: 3452 Reading Drives: '02 3.2 est, '98 3.0 Elite sal	Re: Fans on constantly Reply #8 - 10. Feb 2010 at 17:44 Someone - I think Richard A (but maybe wrong) sent me a guide (one page pdf doc) for diagnosing fan/switch problems. Maybe worth a pm? (I may have it on my home PC but not here)
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