Toyota Corolla heating issue

Payton · 12-12-2010 07:33PM #1

I have a 04 Toyota Corolla and have noticed that the heating inside the car is not as it should be. The engine temp gauge is as normal around half way but the heating coming into the car is very very poor. It really only come into action when I turn the air outlet speed to 3 or 4 and then its only a slight bit of heat coming out. Can anyone throw some answers on this?

ltdslipdiff · 12-12-2010 08:41PM

1) If there is a pollen filter present it may need changing
2) The heating control cable (temp adjuster) may be stretched
3) The matrix may be fcuked
4) You may have an airlock
5) Check coolant level is ok

That is my tuppence

Payton · 12-12-2010 09:00PM

Thanks for the reply. Ive just noticed I wrote its a 04 and it should be a 03, dont know if that makes a differance?
Ive no idea if it has a pollen filter, dont think so.
I can see the cable moving a pully type wheel so i dont think it's streched.
The Matrix??
Im getting air through the vents.
And the coolant is just below the "Full" level.

ltdslipdiff · 12-12-2010 09:09PM

If the car has a/c its possible it has a pollen filter, but its unlikely the source of the problem. More than likely the problem will be in the delivery of the hot coolant to the matrix, which is a little mini radiator in behind your dash board which has air blown through it to heat the air...if that makes sense. Is it a diesel? Have you ever had the cooling system flushed? It is possible that the valve that the heating control operates is stuck......

Payton · 12-12-2010 09:14PM

It has no A/C and its a petrol, Ive never flushed the cooling system, big job???. The controls for the heating are fine when I turn it up to red (High) I get a small ammount of warm are and with the airflow up to 3 or 4.

mgbgt1978 · 13-12-2010 01:14PM

It's a 90% bet that the pollen filter is clogged. Remove it (no need to replace it with a new one unless you really suffer from allergies...and even then only replace it in spring) and you should notice a big improvement.
Instructions on replacing it should be in the owners manual, if not;
http://www.automotivehelper.com/topic306513.htm

biko · 13-12-2010 03:47PM

If the inside heat doesn't come or is low then maybe the coolant could be low/there are airlocks in the system.
Both of these are easy to fix.
First check that coolant level is where it should be.
If it's low or even if it normal try burping car.

Easiest way to burp is to park car facing uphill, drive around until you find a steep hill (air will burp faster this way).
Then remove cap on expansion tank (beware, hot steam will spray out. You can use a kitchen towel and cover the cap and tank so it doesn't spray in your face). Gloves are good too.

Then have ready mixed (50/50) anti-freeze and water (distilled if you can find it) in a two litre old milk jug or similar.
Remove the top bleed screw on the radiator.
While engine runs and heaters inside are on full blast and max heat, slowly pour the mix in until the coolant starts coming out through the bleed hole.
You may have to push the throttle a little to increase flow.
Once the mix coming out the bleed hole doesn't have bubbles you should be fine, it usually takes 1-2 mins and a few pushes on the throttle.
Replace bleed screw and the fill coolant to the designated limit.
Replace expansion tank cap.
Make sure both are firmly in place, there is pressure in the system and if they aren't firmly on coolant will evaporate. Don't break them though.

Payton · 18-12-2010 04:29PM

ltdslipdiff wrote: »

1) If there is a pollen filter present it may need changing
2) The heating control cable (temp adjuster) may be stretched
3) The matrix may be fcuked
4) You may have an airlock
5) Check coolant level is ok

That is my tuppence

Ive just got a chance to have a look at the car as Ive been busy in work all week, I found the pollen filter and its clogged up with dirt so I removed it and drove over the the motor factors and got a replacement and the heat

:):)
Thanks again.

ltdslipdiff · 18-12-2010 06:53PM

on the verge wrote: »

Ive just got a chance to have a look at the car as Ive been busy in work all week, I found the pollen filter and its clogged up with dirt so I removed it and drove over the the motor factors and got a replacement and the heat :):)
Thanks again.

Welcome and Happy (warm) Christmas !!:)

mgbgt1978 · 18-12-2010 09:57PM

mgbgt1978 wrote: »

It's a 90% bet that the pollen filter is clogged.

Dammit. Should have said 99%:):):)

Toyota Corolla heating issue

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