#1: Heater keeps running cold Author: Rob2859, Location: HalifaxPosted: Mon Dec 20, 2010 9:32 am ---- This is the second time now when I have gone to start my car in the cold and the heater refuses to run hot even when the engine gets to full temp. I was trying for 45 min to clear my screen this morning (frozen inside and out). I turned it off and started it many times when going in and out to get warm water and de-icer. I also tried fiddling with the nobs to see if the warm stuff would come out. Didn't go hot but when i came out of work a few hours later it was working fine.
Any ideas?
If I chop the plug off a hair dryer and wire it to my battery will it work as a temp fix?
#2: Re: Heater keeps running cold Author: Zoomy, Location: The NetherlandsPosted: Mon Dec 20, 2010 9:37 am ----
Rob2859 wrote:
...If I chop the plug off a hair dryer and wire it to my battery will it work as a temp fix?...
...does 220V AC and 12V DC ring a bell...??
#3: Re: Heater keeps running cold Author: namgaj, Location: Chasing Ash, Addaz and Lee........... hopefully catching Addaz and havin fun :PPosted: Mon Dec 20, 2010 9:40 am ---- Its 240V in the UK, but I know what you mean
#4: Re: Heater keeps running cold Author: Ste, Location: Hull -or- The World Of Info CodePosted: Mon Dec 20, 2010 9:46 am ----
namgaj wrote:
Its 240V in the UK, but I know what you mean
Used to be it's now standardised to 230V +10% −6% As far as I'm aware..
#5: Re: Heater keeps running cold Author: Danny., Location: PeterboroughPosted: Mon Dec 20, 2010 10:07 am ---- All i know is dont plug a power supply from a pc when its switched onto 110v into a uk soccket
#6: Re: Heater keeps running cold Author: MrBSI, Location: What's it to you? ? ?Posted: Mon Dec 20, 2010 10:09 am ----
Danny224 wrote:
All i know is dont plug a power supply from a pc when its switched onto 110v into a uk soccket
They dont last very long
Can anyone else smell burning
#7: Re: Heater keeps running cold Author: Rob2859, Location: HalifaxPosted: Mon Dec 20, 2010 10:16 am ---- I didn't think about that It just came to my head. Advice on my problem wouldn't go a miss tho
#8: Re: Heater keeps running cold Author: macj, Location: EssexPosted: Mon Dec 20, 2010 10:37 am ---- Check your water level in header tank.... bleed the hoses at the heater for air locks..... get an engine cooling system flush.... alternatively... stick a garden hose up the heater pipes at the back of the engine with both hoses off... do both ways to make sure its not blocked.... remember to check antifreeze levels after Last edited by macj on Mon Dec 20, 2010 10:41 am; edited 1 time in total
#9: Re: Heater keeps running cold Author: MrBSI, Location: What's it to you? ? ?Posted: Mon Dec 20, 2010 10:39 am ----
macj wrote:
get an engine cooling system flush
NON biological washer powder / liquid / dish washer tablets added to the header tank are ideal for this
It MUST be NON biological! ! !
#10: Re: Heater keeps running cold Author: Danny., Location: PeterboroughPosted: Mon Dec 20, 2010 10:40 am ----
MrBSI wrote:
Danny224 wrote:
All i know is dont plug a power supply from a pc when its switched onto 110v into a uk soccket
They dont last very long
Can anyone else smell burning
Ive done that and the pc was sitting on my leg. Scared the jizz out of me.
#11: Re: Heater keeps running cold Author: Rob2859, Location: HalifaxPosted: Mon Dec 20, 2010 11:22 am ---- cheers macj. Do you think its down to a blockage rather than broken heater controls/bad connection then? Checked the water a few days ago and its got pleanty in it. Not sure why that would effect it. How does the heater bring in the hot air I am only familiar with how the cold intake work.
#12: Re: Heater keeps running cold Author: elcamino, Location: home!Posted: Mon Dec 20, 2010 12:25 pm ---- Hot water goes to heater matrix makes a radiator warm.a fan behind this radiator blows the air.air gets warm when passed through then goes through ducts you select on heater panel.two lines from engine coolant system go to heater matrix.if upper one is as warm as the lower one(when engines warm)could be said heater matrix is ok.
#13: Re: Heater keeps running cold Author: Rob2859, Location: HalifaxPosted: Tue Dec 21, 2010 9:36 am ---- I see now. Would have thought if the pipe is frozen then the engine would be overheating as well. I have about half a bottle of anti-freeze in it couldn't fit any more
#14: Re: Heater keeps running cold Author: mjsroofing, Location: south walesPosted: Tue Dec 21, 2010 11:07 am ----
macj wrote:
Check your water level in header tank.... bleed the hoses at the heater for air locks..... get an engine cooling system flush.... alternatively... stick a garden hose up the heater pipes at the back of the engine with both hoses off... do both ways to make sure its not blocked.... remember to check antifreeze levels after
this is what i was going to say.
#15: Re: Heater keeps running cold Author: mjsroofing, Location: south walesPosted: Tue Dec 21, 2010 11:08 am ----
Rob2859 wrote:
I see now. Would have thought if the pipe is frozen then the engine would be overheating as well. I have about half a bottle of anti-freeze in it couldn't fit any more
you need to drain the rad and put a min of 2 litres mate
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it's now standardised to 230V +10% −6% As far as I'm aware..
It just came to my head. Advice on my problem wouldn't go a miss tho 
