Aux Heater

[Phil Neal]

Re 10 degrees C and the coolant temperature falls below 75 degrees C.

SHaran owners manual says 5 and 75 degress not 10 and 75 degrees...

[Danny Boy]

The aux heater keeps cpmmimg on willy nilly even when the coolant temp is at 90 degreees for some time.

 

Hopefully winter wont lats too long, i'll put up with the funny stares in traffic jams!!

 

Its proving hard work reassuring the missus the car is not on the verge of take off/blowing up!! :D :D

[Masked Marauder]

The aux heater keeps cpmmimg on willy nilly even when the coolant temp is at 90 degreees for some time.

 

Hopefully winter wont lats too long, i'll put up with the funny stares in traffic jams!!

 

Its proving hard work reassuring the missus the car is not on the verge of take off/blowing up!! :D :D

Ah yes, but that is the engine temperature, the heater is at the rear of the car and the pipes that connect it are open to the elements. So the temperature in the heater could be less.

[johnb80]

Ah yes, but that is the engine temperature, the heater is at the rear of the car and the pipes that connect it are open to the elements. So the temperature in the heater could be less.

Surely the water temp isn't sensed at the back for controlling the heater on / off / modulation, that must be a function of the engine management I would have thought ?

[Masked Marauder]

The control temperatures for the aux heater are measured in the heat exchanger of the aux heater. It is a self-contained unit with its own control unit.

 

It reports it's faults to the main ECU, that is all.

[GSMGuy]

As MM said, I'd agree that the sensor for the aux heater will be onboard - makes more sense, as the coolant will obviously lose a LOT of heat in the pipework under the vehicle, esp during the conditions the aux heater fires up under, ie less than 10 deg outsode temp, and with all that windchill...

 

Windchill is the biggie here, my brother and I went out on our motorbikes for the day yesterday, temps around 6 deg, but at speed we felt like we were getting frostbite in the fingers...

 

Mike

[Guest blatters]

I know the Tech stuff says that the aux heater fires up if ambient temp is below 5c but that is not the case with my one. It always fires up at below 10/11c and will continue working until the engine hits 90c (normal). It then only fires up again if I am not driving hard enough to keep the engine warm on its own.

The unit has just been replaced with a newer modified one. It has a slightly different pitch to the ''jet sound' and the ticking noise, whilst more audible outside the car, is not noticable inside the cabin - thank goodness.

It is working well now.

 

Blatters :(

[Guest mick]

My booster heater was replaced a few weeks ago under warranty. First time of use of this new unit created masses of white smoke / fumes so dense it engulfed the car each time I sat at traffic lights! Since then however, virtually no smoke, and the fumes have decreased massively. Heater still working, and doing the job of warming engine and cabin considerably quicker than when heater was duff. Also notice that the heater is quieter, ticking gone (I think, I may have just tuned it out in my head), and the heater 'winds down' far quicker than the old unit when engine stopped.