5 replies to this topic

[Caterham]

I have a 2007 ST220 with an odd heater/AC issue. Turn the ignition on, but don't start the engine, set the AC to 20 degrees, auto and I get a good blast of air through the vents.

 

Start the engine and the blast dwindles right down to almost nothing. 

 

The AC diagnostic report no issues. I've cleaned the cabin temperature sensor.

 

Anybody any ideas?

 

TIA

[nicam49]

No ideas really, but how long since you changed the pollen filter?

[Communist]

What about when you manually boost the fan speed up and down? Does it behave as it should then?

[Caterham]

Thanks for the responses.

 

The pollen filter was changed a few months back.

 

The manual override works OK, it just seems to be the auto bit that is playing up.

[stonekeeper]

My tuppenneth

 

 

Could it be the outside air temperature sensor at fault?

 

That may not be involved until started up.

 

 

 

What happens in "Auto" if you change the temperature required?

 

I.e Does the fan speed change then?

[Caterham]

Outside sensor was showing 6 degrees at the time.

 

I will give the other a go.

 

TA