Vectra C 2004 Heater blower blowing cold.

[shaine415]

Hiya all, I brought the car a few weeks ago and had this problem from the start, Had a water leak and did not know where it was coming from or where my water was going and as it rains all day everyday i couldn't see any on the floor, I used K-Seal and the leak has stopped.
I only had setting 4 on the blower so i replaced the resister pack and hurray i got settings 1,2 & 3 working but it only blows cold air, when i bring the revs up over 2500rpm it goes warm (not hot) but when i ease off and revs return to normal it goes cold again, What could this be?

Any help would be much appreciated Thankyou

Just to add its a Vectra C, 2004 (54), 1.8 SXi

[mon]

K seal may have also sealed partially up the, heat exchange for the in cabin heater, or the water pump may be on the way out , what does the temperature gauge say ?

[madmark]

sounds like air in the cooling system to me should be a bleed screw on the cooling system somewere at a high point also get it to the point were it blows warm and change the settings to cold and see if it changer to check the switch is working also check the pipes that go through the bulk head in the the back of the dashboard are getting hot in and out good luck hope you sort it

[shaine415]

K seal may have also sealed partially up the, heat exchange for the in cabin heater, or the water pump may be on the way out , what does the temperature gauge say ?

The tempreature guage is normal, Reads about 90 Degree.

[shaine415]

sounds like air in the cooling system to me should be a bleed screw on the cooling system somewere at a high point also get it to the point were it blows warm and change the settings to cold and see if it changer to check the switch is working also check the pipes that go through the bulk head in the the back of the dashboard are getting hot in and out good luck hope you sort it

Cannot find a bleed nipple, Have run a hose pipe threw the 2 pipes that go threw the bulk and water comes threw, The pipes however, 1 gets hot and the other only gets luke warm and have also changes the setting from cold to warm and all seems to be working but when turned all the way to cold it knocks badly as if its trying to adjust more but it cant, when turned to hot it makes no knocking noise but can see a red clip thing move on passenger side (when glovebox taken out) and a motor working.

[plasma]

that is an airlock you have there, Had that on a cdti i did a complete coolant flush on. Refilled it, ran it up to temp, no cabin hot air, one feed nice and hot going through the bulk head other was cold. Coolant screw was bleed. Had to run it up and down a few times and relieve pressure from the coolant tank and eventually it gurgled, cleared itself and i added another litre of coolant

[madmark]

yes sounds like air to me aswell

[SlowCoach]

Same here, part thinks blockage part think airlock. Was thinking of tilting the car sideways on left to get it to release air out. But doubt it. Have spare matrix... BUT... Worry about water getting all over driver area!!

Should i attempt this?? Replace matrix??

[shaine415]

that is an airlock you have there, Had that on a cdti i did a complete coolant flush on. Refilled it, ran it up to temp, no cabin hot air, one feed nice and hot going through the bulk head other was cold. Coolant screw was bleed. Had to run it up and down a few times and relieve pressure from the coolant tank and eventually it gurgled, cleared itself and i added another litre of coolant

Hiya, Thanks for help, Any idea how i can bleed the system, ive searched all the coolant pipes and the pipes going threw the bulk to the matrix and cannot find a bleeding screw...

[troutybrown]

You haven't got a bleed screw on that engine. What i would do is drain coolant from bottom of radiator and refill SLOWLY i use a small funnel so it restricts the flow, this allows the air to escape better as its filling. Once full turn heater on full and start engine until up to temp top up as necessary.Allow to cool and check level