Blowers cold after an hour driving

ryzzey · Feb 5, 2018

Hi,

My Seat Leon SE Tech 2014 has started blowing cold air after driving for about an hour.

When I start the car in the morning it gradually warms up, then all of a sudden an hour later it switches to freezing cold air.

If I turn the engine off and back on again it usually comes out hot again for a moment, then cold again.

Have looked around and seen that it could be heater matrix, control valve or something else?

Any help would be appreciated!

Thanks

yanivkoval · Feb 6, 2018

In general you are right.
It could be any of the reasons you have mentioned.

Without proper diagnostics it is impossible to diagnose over the internet.

1) did you check your coolant level ?
2) did you check the coolant pipe temperature that goes inside the vehicle before and after the valve by touching it ? (It suppose to be hot)

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ryzzey · Feb 6, 2018

Hi, thanks for your reply. I know it's hard to diagnose over the internet but I just wanted to make sure there wasn't anything else I should check before I get it looked at at a garage.

Had it serviced last week so didn't think it would be the coolant, after checking the coolant was empty! Going straight back to the garage to see why they didn't check.

Unless I've lost an entire tank of coolant in a week but haven't noticed a leak.

Thanks again

yanivkoval · Feb 6, 2018

You are welcome

Sounds like a terrible service to me !!!

Please after you’ll visit the garage, tell us what happened next...

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digitalmadness · Feb 7, 2018

ryzzey said:
Hi,

My Seat Leon SE Tech 2014 has started blowing cold air after driving for about an hour.

When I start the car in the morning it gradually warms up, then all of a sudden an hour later it switches to freezing cold air.

If I turn the engine off and back on again it usually comes out hot again for a moment, then cold again.

Have looked around and seen that it could be heater matrix, control valve or something else?

Any help would be appreciated!

Thanks

I'm having the same issue, car was serviced yesterday so fluids are fine. Only other symptom is that it disabled start-stop due to a/c being on, when the a/c is definitely not on.

ryzzey · Feb 9, 2018

Quick update, took it back to where I had it serviced. He said someone has previously put the wrong coolant in and the coolant system was full of sediment.

It is currently in with Seat who have flushed the system and had to replace the coolant tank head.

Highly recommend you all to use only G13 coolant and check the tank isn’t full of crap!

£275 later I have warm air from the blowers and a fully functioning cooling system!

yanivkoval · Feb 9, 2018

I’m glad you resolved the issue

Thanks for the update

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Blowers cold after an hour driving

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