Aux Heater

[gixersteve]

hi guys

 

Car heater take hours to get warm and that extra fan boast you get anit there. i have noticed the aux heater is not coming in either i understand thats why heating system is not getting hot. but i cannot find the temp swtich which is said to be attached to the linkage only wiring attached to the wipers other than the motor is for washer jets or i guess it is as thats where it runs to. is it a matter of seeing if i have voltage going to the system and if so the plug is u/s.

also i have noticed when lights and screen heaters on the fan speed drops any ideas

[seatkid]

There is a small metal can hanging in front of the pollen filter in the engine bay - scuttle tray. This is a themoswitch operating at about 5 deg c. You can short the 2 pin connector out (a small auto fuse fits, apparently) to force the heater on.

 

If your car is a MkII, then IIRC when your heater fails to start up 3 times or so in a row, the ECU flags it as faulty and you need to clear the error with VAGCOM or diagnostics. This applies when you have a faulty heater glowplug.

.

[gixersteve]

There is a small metal can hanging in front of the pollen filter in the engine bay - scuttle tray. This is a themoswitch operating at about 5 deg c. You can short the 2 pin connector out (a small auto fuse fits, apparently) to force the heater on.

 

If your car is a MkII, then IIRC when your heater fails to start up 3 times or so in a row, the ECU flags it as faulty and you need to clear the error with VAGCOM or diagnostics. This applies when you have a faulty heater glowplug.

.

Thanks for that mine is a mk II so link out the sensor wont help much as i still wont fire till i clear the fault codes? bummer guess its stitch up time at my local dealer

[chromedome]

I also have an aux heater question.

 

For some reason mine won't fire up when the outside temperature is below 4C. A new heater was fitted earlier this year because of this issue. Anyone got any ideas? The temperature switch has also been changed.

[chromedome]

I also have an aux heater question.

 

For some reason mine won't fire up when the outside temperature is below 4C. A new heater was fitted earlier this year because of this issue. Anyone got any ideas? The temperature switch has also been changed.

[edatelder]

See

Auxilliary heater FAQ

[Caff]

We're going to have a look at our heater too. The photos are missing from this FAQ. Is it possible to restore them?

[gixersteve]

people beware there is 3 different types of glow plug dont find out the hard way like i did my heater is on wing nuts now its being on and off so many times and still not got the right plug yet waiting on fords