Hi All

Hope someone can help,i have had a new heater matrix fitted 3 weeks ago due to no heat.today no heat again,the coolant level was low so i topped it up.both heater pipes are hot but no heat,any ideas.

Thanks

Wayne

Hi All

Hope someone can help,i have had a new heater matrix fitted 3 weeks ago due to no heat.today no heat again,the coolant level was low so i topped it up.both heater pipes are hot but no heat,any ideas.

Thanks

Wayne

Assuming there is not a leak. I would have suspected the heater matrix may not be bled properly and you have an air lock. Else a blockage somewhere.

But if you have hot water in and out of the matrix then I would suspect that the air flap system is not working properly to,let external cold air pass over the hot heater matrix and thus warm the interior. Does the system blow cold air or NO air into the car?

Is the fan turning or has the fuse gone?

Assuming there is not a leak. I would have suspected the heater matrix may not be bled properly and you have an air lock. Else a blockage somewhere.

But if you have hot water in and out of the matrix then I would suspect that the air flap system is not working properly to,let external cold air pass over the hot heater matrix and thus warm the interior. Does the system blow cold air or NO air into the car?

Is the fan turning or has the fuse gone?

Hi

i cannot see any leak and the fan just blows out slightly aired when in the hot position.I removed the glove box and can see and feel the red and blue arms move on heat and direction change

Did they check the flap motors, as this is the usual cause of no heat. They are electrically operated and sometimes get stuck or out of sync. I would be very suprised if they was any issue with the matrix on either occasion.

Did they check the flap motors, as this is the usual cause of no heat. They are electrically operated and sometimes get stuck or out of sync. I would be very suprised if they was any issue with the matrix on either occasion.

Hi

The thing is that after the matrix was replaced there was heat for about 3 weeks and then it stopped and the coolant level was low so i topped it up and still no heat.

You've got all the symptoms of an air lock. Return to garage!

Ray

Hi Again more help required please,i have very low heat from the heater in fact sometimes no heat.there has been a new heater matrix fitted 3 weeks ago and we did have heat although i did notice a bit of gurgaling behind the dash.Today while driving through buxton at -1 the temperature gauge was on 90 i switched the heaters on a little bit of heat came through and then the temperature gauge dropped to 60 and then the warmth stopped.I Took the car to our local VW dealer who checked it out and said either the water pump and or the thermostate does this sund possible any advice would be really appreciated.

Thanks

Wayne

I'll merge this with the other thread, multiple threads on the same topic only confuse things.

... I did notice a bit of gurgaling behind the dash. ... Took the car to our local VW dealer who checked it out and said either the water pump and or the thermostate does this sound possible any advice would be really appreciated.

In a word - NO! It's clearly an air lock, which - admittedly - are sometimes a pain to clear. The introduction of air into a pressurised system is the cause and if either the pump or thermostat had allowed this, they would be leaking in order to do so.

Take it back to the garage who fitted the matrix and INSIST that it's thoroughly bled and the problem cured.

Getting further differing opinion distracts from where the blame really lies - the garage who fitted the new part.

Ray

latest update.on saturday i put a new thermostate in and refilled the coolant ran and tested still no heat,so yesterday as driving back home temperature gauge went very high so stopped and leapfroged home.got home called RAC out they checked coolant level and that was very low so the filled it up checked a few things and said it was the water pump.today new water pump timming belt fitted,went to pick it up heaters were perfect.drove car for about 30 miles then heat started to drop and eventualy went back to cold then temperature gauge shot up and went straight back to normal with very cold air blowing through on max heat.took car straight back to garage they checked the coolant level and it had dropped and needed topping up.the top pipe from the radiator was very hot but the bottom pipe was nearly cold.they said it might be a faulty thermostate.can anyonre give me a relife from my headache and solve this problem money running out and so is patience.

thanks

Wayne

Check for blockages in radiator etc. failing that are you vac filling the cooling system? This would rule out airlocks and would high light any blockages.

Check for blockages in radiator etc. failing that are you vac filling the cooling system? This would rule out airlocks and would high light any blockages.

Hi Just normal filling not pressure filling.

What engine is it?

Might be worth trying to vac fill it but tbh I don't normally struggle.

What engine is it?

Might be worth trying to vac fill it but tbh I don't normally struggle.

1.9tdi

No wonder money is running out - you're spending it un-necessarily. The water pump and thermostat replacements were a waste of both time and effort. Why won't you take it to the garage responsible for introducing the air lock? Failing that - assuming it's a different garage now - return it to the fitter of the water pump and demand that the airlock is dealt with. I'm at a loss to understand why you're trying to fix for yourself a problem caused by a garage and incurring more pain in doing so - it simply doesn't add up?

Ray

No wonder money is running out - you're spending it un-necessarily. The water pump and thermostat replacements were a waste of both time and effort. Why won't you take it to the garage responsible for introducing the air lock? Failing that - assuming it's a different garage now - return it to the fitter of the water pump and demand that the airlock is dealt with. I'm at a loss to understand why you're trying to fix for yourself a problem caused by a garage and incurring more pain in doing so - it simply doesn't add up?

Ray

Hi Ray

would you sugest haveing the system vac filled.

My only suggestion is my original one - take it back and get it sorted out by the garage that caused the problem in the first place. How they do it is up to them, but do it they must. If they're not competent to cure it, tell them that you'll take it to a dealer and bill them. DO NOT be sent away - it's their fault!

Ray

the latest update now had cooling system filled 3 times once being pressure filled.still no heat only just aired.the car is not overheating and no oil in water,no loss of power.I read on here someone had similar problems and it was a cylinder head job.any ideas please.

So it's not over heating but heater isn't getting hot, are the pipes going to the heater matrix hot?

So it's not over heating but heater isn't getting hot, are the pipes going to the heater matrix hot?

only the flow is hot and the return is cool

Is there water in the matrix?

only the flow is hot and the return is cool

Is this a Skoda dealership you're dealing with? The answer to the problem is right there in your statement, in that the water is not flowing through the matrix core. SURELY this has been pointed out to the numb nuts at the garage? If it's a Skoda dealer, time to escalate this problem, otherwise you'll be considering having the head removed.

I believe it's safe to assume that the heater matrix is not blocked, because it's new. However, given the appalling service you've been subjected to so far, it might be an idea to disconnect it from the system, then pass water through it in both directions. Once that proves that the core is unblocked, reconnect, bleed to remove the AIR LOCK and you should be good to go. This would be amusing if it weren't so bloody shameful in regard to the garage involved.

Ray

Theres a bigger problem than just no heat!

Why is it using so much coolent and where's it going!! Sound more like a head gasket problem or a cracked block. Neither of these means the oil and water has to mix!