The heater on our COrsa hasn't been working for over a week now. Cold air comes out but no hot air.

I don't drive so haven't got a clue where to look

Did look at the manual and it only tells you how to use the dials.

Any ideas guys

Cheers.

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It may seem difficult at first! But everything is difficult at first.

What does the temperture gauge indicate?
I'm thinking it could be a water pump failure, if so I would expect that on arun of 10 miles or so that the needle would be heading for red...

Might be an idea to check the coolant level as well..as loss of coolant would also indicate pump failure..

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Verwood Handyman
I Know it says I'm On-line, but I might have just left myself logged in, whilst I'm out....

Firstly you have to ascertain if the controls operate the flaps that divert air through the heater radiator as these can sometimes get stuck shut. Turn the blowers on and listen for the air diverting to different vents. Then open and shut the hot and cold and see if you can hear a difference in sound. If this all sound okay then it could be one of the following.

It might be the thermostat that has failed and it has stuck open so it takes a long time to get the temperature up in cold weather. Another issue could be that it is a blocked heater radiator. Have you used Bars-leak in the past? This is a additive that you put in to seal leaks from inside and it tends to block the small capillaries in a radiator.

All of these are difficult to spot if you are not mechanically minded.

DWD

Just back in from the car. Had a look under the bonnet. Don't have a clue what to look for lol.
The radio hasn't been working for a few weeks now so i thought the two problems might of been connected like it needing a new fuse.

Due to the view that it could be a number of problems I will need to get it into a garage.
More dosh out of my pocket

Thanks guys.

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It may seem difficult at first! But everything is difficult at first.

Yeah, check all your fuses (often 2 lots, some under the bonet and also some inside the car somewhere). On modern cars the hot / cold flap is sometimes moved by a small motor so an electrical fault can also be the cause. (even if the blower fan can be heard working)

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Mike

Update.

Managed to fix the radio. Took the car to a components shop sold me a fuse for 50 pence and also fitted it.

The guy at the shop says that the reason there is no heating is probably due to your thermostat not working.

Took it to the garage this morning. Phoned me back saying the thermostat is fine and that the head gasket has gone and needs replaced.

As said before I don't know a lot about cars. But I thought that if your head gasket goes your car will not start and has problems with water and oil
I haven't had these problems.

Anyideas how much I am looking at to replace.


Cheers

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It may seem difficult at first! But everything is difficult at first.

ouch...when the head gasket goes there is normally a reason why..normally overheating. Don't know what your garage will charge for this, last one I needed was on a rover 820, cost £600 plus vat..and that must hve been 10 years ago...


Only to find that the reason the gasket needed replacing was a blockage in the cooling system, which still needed fixing...


Depending on the age of your Micra, might be worth scrapping and starting again..

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Verwood Handyman
I Know it says I'm On-line, but I might have just left myself logged in, whilst I'm out....

Wine o.The thing is. Apart from no heating coming through the vents only cold air everything is working fine. There is no over heating.

It is a Corsa 03 with less than 60 thousand miles.

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It may seem difficult at first! But everything is difficult at first.

Bit more to it than that, Head gasket gone (Assume this has been diagnosed via a compression test) then there must be a reason..the head gasket is wher the engine block meets the cylinder head, there are lots of things going on here, holes for coolant/oil to flow around, pistons moving up down in the block, valves (inlet / outlet) moving in the cyl.head..

I don't know how many/where temperature sensors there are on the micra, but If for whatever reason, the water wasn't circulating (Symptom..heater not working),,then coolant Could be boiling at the head, which will destroy the gasket..or worse..

If I were you I'd get a second opinion..the Gasket may be gone..but what is the cause?

Replacing the gasket might solve the problem short term, but why did the gasket blow in the first place?

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Verwood Handyman
I Know it says I'm On-line, but I might have just left myself logged in, whilst I'm out....

this happened to my fiesta,cost me £25 for a new heater control valve
IF everything is working ok no over heating etc,then before you shell out for head gaskets get your head back under the bonnet,trace the heater pipes that go into the car there should be 2 of them about 25mm thick try looking under the scuttle where the wipers mount this is a flow and return through the heater matrix
with the engine up to temperature and the heater switched to hot both pipes should be hot if ones cold and the other is hot it might be the heater control valve or the matrix thats failed
if its the control valve you can bypass the it by removing it and connecting a couple of peices of 15mm copper the heater will be on all the time but this weather you need it

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The garage is going to phone us tomorrow. I will let you know what their quote is.

cheers.

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Lift up the bonnet and look for a bottle that looks like this and it should be half full.

Hi folks. Apologies for not getting back sooner.

Got a quote from the garage. Said that gasket is leaking water and that it needs replaced. Gave me a quote of £670

Decided against getting it fixed due to it being nearly ten years old. Although it has only done 60 thousand miles.


Corsa.

Had a look under the bonnet.The bottle is half full.

What is that bottle for??? Is it for anti freeze.????

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Mix of anti freeze and water, (Coolant) also contains rust inhibitors..runs around the engine/rad/heater matrix..

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Verwood Handyman
I Know it says I'm On-line, but I might have just left myself logged in, whilst I'm out....

Cheers Wine O

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It may seem difficult at first! But everything is difficult at first.