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Having just driven for 2 hours through freezing fog with the hood down...that's another story I appreciated how ineffective the heater was / is.

Essentially I don't have any heat at all, was OK'ish  last year.

Suggestions where to start appreciated.

Thanks

Phil

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Hi Phil,

is your heater valve on the head fully open - the original type is quite useless and can be closed when you don;t knowit.

You may have an airlock in the heater matrix remove both hoses (in the engine bay) and connect to garden hose and give it a blasting.

When reconnecting ensure you do not put the air bubble back in.

I assume you do have air flowing through the heater matrix to your feet.

 

Roger

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Hi Rog,

Heater value is in the fully open position.

No hot air to my feet ( difficult to tell with hood down and a blanket over my legs ) but coming through the side dash vents.

Fan working OK.

I will try the garden hose tomorrow, if that doesn't work should i replace the heater valve ...what type is best.

Phil

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Hi Phil

The heater valve is located at the back of the cylinder head easy to remove check once engine warm if the hose gets hot first obviously with control inside on warm I would also check the distribution control cable do this by operating whilst looking at the flap on bottom of heater unit in the car from either the drivers or passenger foot well sounds like it will be the valve on the head as other say its not a good design 

Chris

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1 hour ago, Phil H 4 said:

Having just driven for 2 hours through freezing fog with the hood down...that's another story I appreciated how ineffective the heater was / is.

Essentially I don't have any heat at all, was OK'ish  last year.

Suggestions where to start appreciated.

Thanks

Phil

What about keeping all tools stored and just touch the hoses under the dashboard with your hands for a first test?

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Marco’s advice is spot on to get a decent diagnosis.... feel the hoses to/from the heater valve and the heater box. You should feel an increase/decrease in the temp of the hoses when altering the valve position (assuming it isn’t blocked so badly that it hardly alters)

As mentioned, be sure to have the outside air scuttle-flap open otherwise the matrix won’t be getting any airflow.

if you get to the point of flushing the matrix and hoses with a garden hose be careful not to crank the pressure up too high - you could damage the matrix.

....... Andy 

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  • 1 month later...

So back to the heater....

Looks to be the valve although it looks pretty new.

Reading another thread which highlights valve issues other members have had it steered me in the right direction.

Thanks Guys..

At the risk of repetition !

I have ordered Four seasons Everco 74648 through Rock Auto part £22.59 plus FedEx and VAT £39.39 ( plus duty tbc)

Cheers Phil

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