03 Corolla

PC1971

Hi, my daughter has an 03 Corolla hatchback 1.5vvti, I drove her car today and noticed that the heaters only worked when accelerator is pressed, when car is stoped and ticking over there is no heat coming into through the vents, seems strange any help appreciated, thanks Paul.

colm_mcm

Is the fan working? As in is there air flow?

mgbgt1978

What Colm said....also have the pollen filter checked (often blocked,and can be just removed and thrown away) as the extra air-flow caused by the car moving will help the fan to force some warm air through the system.
The fan should be easily heard running, especially on the highest setting.

PC1971

Yeah fan is working, just when i put down the boot heat comes through the vents then weird !!

PC1971

Sound thanks for that , will check it out,Paul.

mgbgt1978

Have a google on the removal of pollen filter on this model...usually not too hard, and try driving without it.
Just make sure to replace the cover first.

colm_mcm

OP, When you say its hot when the accelerator is pressed, you don't really mean its hot when the car is moving or anything do you?
As in is it blowing out cold air then suddenly hot air when you rev up?

PC1971

I know it sounds daft, but if the car is stoped and ticking over, fans are on full blast and working,, its also on high heat setting, its blowing cold air, but if i rev up the engine it will blow out hot air !!!!

colm_mcm

That's odd, anything odd with temp gauge, radiator hoses etc?

keithsfleet

If it was only blowing hot air while being revved I'd be leaning towards a partially blocked heater matrix.

PC1971

I just removed pollen filter and tried, no change, as i said only blows hot air when revs are up,either moving or parked, temp gauge working perfect no leaks or nothing

colm_mcm

Have you checked the coolant level?

PC1971

Hi, Just checked coolant level and it was very low, so i toped it up, sat in the car ticking over and no joy, so i took it for a spin came back and its blowing hot air ticking over, thanks a million to you all, problem solved, very happy daughter also,

PC1971

colm_mcm wrote: »

Have you checked the coolant level?

Toped up with coolant problem solved, thank you .