2005 Vauxhall Vectra Heater problems

MARKNIC79

MEMBER
2005 VAUXHALL VECTRA
4 CYL
2WD
MANUAL
55,000 MILES

My vectra heating fans are only blowing cold air. I have replaced the thermostat and checked the matrix and fan which is fine. I have checked the heating fuses too and there fine too. The fans are blowing well and strong but no heat is coming through at all. So I presume the fan motor is at full working condition. It seems like there is something stopping the heat coming from the matrix up through the fan system. Help!

5 Replies

DAVE H

MECHANIC
13,384 POSTS

Flush the cooling system. To remove any blockages !

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Monday, November 2nd, 2009 AT 4:32 AM

MARKNIC79

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3 POSTS

Thank you for your reply. I flushed the cooling system out when I changed the thermostat. After running the car to temperature I felt the cooling pipes to the thermostat then from the thermostat to the matrix and they were all hot. I think it could be an electrical fault. Maybe a solenoid or the temperature mixer? Something somewhere is not letting the hot air through the air vents.

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Monday, November 2nd, 2009 AT 4:51 AM

DAVE H

MECHANIC
13,384 POSTS

Check the blend door on the heater box. It may be stuck in the cold position !

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Monday, November 2nd, 2009 AT 5:02 AM

MARKNIC79

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3 POSTS

Thanks Dave I will check this and let you know how I got on. Is the heater box located behind the center console air vents? Or do I need to remove the glove box to locate it?

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Monday, November 2nd, 2009 AT 5:09 AM

DAVE H

MECHANIC
13,384 POSTS

The blend door should be located near the heater matrix and controlled by a vacuum hose you can usually access from under/behind glove box. I do not have any diagrams to supply for this vehicle as it was not released in the U.S.