Omega Owners Forum - heater blowing luke warm

Dai Newbie Offline Posts: 4 Manchester Gender: Drives: '98 mv6 auto estate	heater blowing luke warm 11. Feb 2010 at 07:42 My fans are working OK but even on max heat the air is only luke warm. The temp reading on the dash is about 20 degrees above actual temperature. Is this coincidence or are the 2 connected? Car is a 98 MV6.
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rustym95 Omega Knight Offline carn't get up dont go out!! Posts: 1448 Rotherham south yorks Gender: Drives: 2.0i 16v CD Estate 95	Re: heater blowing luke warm Reply #1 - 11. Feb 2010 at 07:47 sounds like you may need to back flush your heater rad.
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Jimbob Global Moderator Admin Team Offline Third nipple removal completed succesfuly Posts: 20462 Chester / Flintshire Gender: Drives: 52 3.2 MV6 Estate & 98 3.0 MV6 Manual Estate	Re: heater blowing luke warm Reply #2 - 11. Feb 2010 at 08:16 If the car temp itself isnt rising to midpoint on the guage, then sounds like thermostat. if it is, then flush the heater matrix as a 1st port of call, check the maint section for a how to
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Andy H

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Posts: 1833
Cornwall
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Drives: 03 2.6 Elite Auto

Re: heater blowing luke warm
Reply #3 - 14. Feb 2010 at 13:32

Dai wrote on 11. Feb 2010 at 07:42:

My fans are working OK but even on max heat the air is only luke warm. The temp reading on the dash is about 20 degrees above actual temperature. Is this coincidence or are the 2 connected? Car is a 98 MV6.

I think I read somewhere that the climate system uses the outside temperature somehow.

A faulty outside temperature sensor could therefore confuse the climate system. (not sure if this applies to mini-facelift as well as facelift).

I think the outside sensors are cheap & easy to replace so it would make sense to change that first before pulling the heating & cooling systems apart.

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Previous vehicles: Viva, Chevette, Astra mk2, Carlton mk1, Astra mk2, Land Rover SerIII, Carlton Mk2, Range Rover, Omega 2.5 V6
"Deja Moo - The feeling that you've heard this bull somewhere before."

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Mr.Salvador Newbie Offline Posts: 22 Gender: Drives: Omega Elite 3.0 V6	Re: heater blowing luke warm Reply #4 - 18. Feb 2010 at 15:14 mine is doing something similar. Im about to fit a new water pump as i think this is the problem. try that
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Rockhampton

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Gone!

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Trecelyn, Gwent
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Drives: A little French Car

Re: heater blowing luke warm
Reply #5 - 18. Feb 2010 at 22:01

Andy H wrote on 14. Feb 2010 at 13:32:

Dai wrote on 11. Feb 2010 at 07:42:

My fans are working OK but even on max heat the air is only luke warm. The temp reading on the dash is about 20 degrees above actual temperature. Is this coincidence or are the 2 connected? Car is a 98 MV6.

I think I read somewhere that the climate system uses the outside temperature somehow.

A faulty outside temperature sensor could therefore confuse the climate system. (not sure if this applies to mini-facelift as well as facelift).

I think the outside sensors are cheap & easy to replace so it would make sense to change that first before pulling the heating & cooling systems apart.

Just posted a similar thread... my dash is saying 68 degrees, and the heater is blowing cold air... the climate control does rely on the outside temperature sensor. £3.85 from AutoVaux.... Thumbs Up!

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Previous GM Models include '00 Omega 2.5 CD Auto, '06 Holden Commodore Executive 3.6 Auto, '99 Astra 1.8 CDX Auto, several Astra Diesels.

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Sad Senior Member Offline Posts: 510 Surrey Gender: Drives: no longer a 2000 3.0 Elite Auto Saloon, but a MkIII Golf GTi :o(	Re: heater blowing luke warm Reply #6 - 22. Feb 2010 at 11:16 I'm aware that the 'sampling fan' not working can affect the heater: http://www.omegaowners.com/forum/YaBB.pl?num=1162120610 HTH
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