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Author Topic: No Heating on Climate Control...Any Ideas??  (Read 1209 times)

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MutantCav

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No Heating on Climate Control...Any Ideas??
« on: 23 February 2011, 14:39:14 »

Ok the new Elite generally works fine in every way as far as I can tell so far...sorted the minor issues it had (couple of breather pipes off, couple the wrong way round, CD changer code needed entering, drivers door speaker shorting out, airbag light on, sunroof not working etc).

One last issue is the Climate Control...no heat...

Settings work fine in that you can adjust the fan speed ok between off and 9, auto works, temperature reads 6.5 degrees on the display which seems about right...flushed the heater matrix through with the hose last night both ways and water comes out as clean as it went in...so I'm at a loss as to what it could be...any ideas??

Thanks in advance :y
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RobG

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Re: No Heating on Climate Control...Any Ideas??
« Reply #1 on: 23 February 2011, 14:49:15 »

Faulty HBV? Have you tried removing & plugging vac hose on top of HBV Chris :question
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MutantCav

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Re: No Heating on Climate Control...Any Ideas??
« Reply #2 on: 23 February 2011, 16:31:45 »

Oh yeah forgot to say HBV has been replaced although not by me...I do have a vac hose running through the bulkhead next to the heater matrix hoses that currently is not attached...also have a spare plug thats not plugged in at the back of the engine passengers side...dont know if they are related

Not tried blocking the vac hose thats on top of the HBV what would that do?  ::)
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GaryBC

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Re: No Heating on Climate Control...Any Ideas??
« Reply #3 on: 23 February 2011, 20:51:19 »

When I had this problem I tried everything you're trying but ended up changing the heater matrix.

Don't panic!! If you have to do that there's an excellent How To guide here for changing it through the footwell. New matrix costs about a score and it took me about an hour to change using the guide.
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Re: No Heating on Climate Control...Any Ideas??
« Reply #4 on: 23 February 2011, 21:02:29 »

Check the outside temp sensor, under the front bumper pass side, it affects the climate operation if i remember corectly. Also get all the vac hoses connected as well this may also be a factor.
« Last Edit: 23 February 2011, 21:03:17 by ffcgary1 »
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Re: No Heating on Climate Control...Any Ideas??
« Reply #5 on: 23 February 2011, 21:12:03 »

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MutantCav

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Re: No Heating on Climate Control...Any Ideas??
« Reply #6 on: 23 February 2011, 21:31:26 »

Thats a very handy diagram...I would say the vac pipe that has come loose is the one to the heater bypass valve...just gotta find the valve and plug it back in...would this result in loss of heat??
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Re: No Heating on Climate Control...Any Ideas??
« Reply #7 on: 23 February 2011, 21:58:57 »

Sure will. :y
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MutantCav

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Re: No Heating on Climate Control...Any Ideas??
« Reply #8 on: 23 February 2011, 22:11:01 »

Just realised I'm getting very confused but just worked it out in my head...so the heater bypass valve is the valve on top of the connector that has the 2 pipes coming out and into the bulkhead...now, the vac pipe coming out of the bulkhead is what should go into the top of it?? but it currently goes nowhere...BUT there is a vac pipe running into the top of the HBV from god knows where!! I will most definitely have to have a check of the diagram against where the vac pipes have been plugged as it seems it definitely not right on the car...
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Re: No Heating on Climate Control...Any Ideas??
« Reply #9 on: 23 February 2011, 22:20:37 »

Quote
Just realised I'm getting very confused but just worked it out in my head...so the heater bypass valve is the valve on top of the connector that has the 2 pipes coming out and into the bulkhead...now, the vac pipe coming out of the bulkhead is what should go into the top of it?? but it currently goes nowhere...BUT there is a vac pipe running into the top of the HBV from god knows where!! I will most definitely have to have a check of the diagram against where the vac pipes have been plugged as it seems it definitely not right on the car...
Vac pipe connected to top of HBV runs through by pollen filter housing and behind glovebox to vac valve. The "spare" pipe you got Chris is probably in this pic

http://i84.photobucket.com/albums/k17/Tiff4327/Vacuumpipes.jpg
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Re: No Heating on Climate Control...Any Ideas??
« Reply #10 on: 23 February 2011, 22:31:06 »

On my car...the 'spare' pipe is one of the two running through the bulkhead from the heater matrix...the one currently in the top of the HBV runs down the passengers side of the engine...not traced where it goes yet as its dark now lol
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Entwood

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Re: No Heating on Climate Control...Any Ideas??
« Reply #11 on: 23 February 2011, 22:35:10 »

Just to aid you ....  vac to the HBV turns OFF hot water, no vac = heat.

So if you have the "wrong" pipe connected to it giving permanent vac .. that would explain the lack of heat. The correct pipe is controlled by a solenoid valve behind the glove box

HTH  :)
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MutantCav

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Re: No Heating on Climate Control...Any Ideas??
« Reply #12 on: 23 February 2011, 22:47:24 »

Thanks Entwood...will let you know where the current pipes go and hopefully the right pipes in the right place will sort it :y
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Re: No Heating on Climate Control...Any Ideas??
« Reply #13 on: 24 February 2011, 13:27:55 »

Right this is now sorted :y Thanks for the help :) Now have heat and car is definitely more responsive, about 30bhp more according to the Mark DTM's posting with the vac pipe diagrams sounds right :y

So basically, the vac pipe that should have run to the HBV was hanging loose...it had been replaced by some bodging whereby an extra T had been added to the brake air servo system which ran straight into the HBV...very odd  :D
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