316I Compact Heater Problerm

[Samuel Dalton]

Hey guys me again :) i forgot about the problem with my heaters, I did a search and couldnt see anything to help me . My temp gauge slowly builds up to the centre within 5 mins or so, the heater doesnt blow out warm air its cold but sometimes its ever so slighty warm when the heaters are off but after 30 secs it blows cold again. sorry for the confusion :)

Thanks

Sam

[Ben328]

Hey guys me again :) i forgot about the problem with my heaters, I did a search and couldnt see anything to help me . My temp gauge slowly builds up to the centre within 5 mins or so, the heater doesnt blow out warm air its cold but sometimes its ever so slighty warm when the heaters are off but after 30 secs it blows cold again. sorry for the confusion :)

Thanks

Sam

Hi My friend had the same problem in is... the cable had slipped of the back of the dial... It was an easy fix

[Samuel Dalton]

surely that wouldnt be why its blowing out cold air all the time though? i havent checked the dials as im unsure how to take them out.

[Samuel Dalton]

anyone any info please?

[Guest Mister Dabsy]

Could be a sticky thermostat or air-lock in coolant !!

[Samuel Dalton]

i have no idea how to drain the airlock in the coolent or even where my thermostat is lol :P

[stebaz47]

the heater on mine does the same but blows hot all the time great in winter not so good in summer

ill fix it one day

[IanIOM]

sounds like a airlock,bleed the system,what year/model is and i will do a how 2 guide for you

[Samuel Dalton]

its a 1998 316i compact. thanks Ian

[Samuel Dalton]

Anyjoy? its starting to anger me lol

[Guest Mister Dabsy]

Right, here we go...

Does your top-rad hose have a cross-head plug installed? Yes, run the engine (heater on max+heat) until warm and slowly open this until ONLY water expels... Tighten plug !

If not, get her on ramps (front wheels not rears lol) and run the engine... Warm her up and carefully release the rad-cap, leave her running for a while (heater on max+heat) until you're happy there are no more bubbles (10mins after temp in middle)... Close rad-cap.

Take her for a blast !

If the heater still blows coldish then it could be the Blower Resistor at fault... More on this if you still have no-joy...

[Samuel Dalton]

Thanks alot I will try this tomorrow when it brightens up and not as cold (sucks in belfast) but thanks for the reply :D

[Samuel Dalton]

I dont understand what you mean by the second part you wanted me to do below which i highlighted. is there another rad-cap or do you mean the top one? I tried the plug thing you told me at first but it didnt work.

also I felt the pipes going to the rad and the top one is roasting hot and the bottom one is cold. It's starting to worry me a little as I have been driving it around for a while now and im scared of the car blowing up lol.

get her on ramps (front wheels not rears lol) and run the engine... Warm her up and carefully release the rad-cap, leave her running for a while (heater on max+heat) until you're happy there are no more bubbles (10mins after temp in middle)... Close rad-cap.

Sorry for sounding dumb

Sam

[Guest Mister Dabsy]

Never apologise Sam... Me thinks you either need a new thermostat or, at worst, a new water-pump...

[Samuel Dalton]

are they costly? and easy to fit? is the thermostat easy to get at?

Thanks

[Guest Mister Dabsy]

Very easy... ;)

[Samuel Dalton]

Smashing thank you, i will drop it off at the garage tomnorrow to get it checked over see what it needs and see what its going to cost