hi can anyone tell me why my heaters blow cold when the engine is ticking over if i rev it they get hot i,ve checked the thermostat thats fine the temp gauge reaches normal and the cooling fans switch on and off any ideas cheers dean
I've just had a similar thing on my van, bit of a long story but this was one of the problems.
The pump was goosed, I had taken out the thermostat & I could see the impelers on the pump, pushed my finger in & tried to turn them, I couldn't, got a mate to flick the engine over & could see the pump going around so I thought all was ok.
The van was overheating in the end, put in a new pump, sorted it out.
I stripped the old pump down & the impeler drive slpines were nearly none existent, would never have beleived it after seeing it go around.
I got the full pump with casing & seals for just under £40.00 from euro car parts.
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