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car heather blowing cold air?

I got vauxhall corsa comfort (a/c) 1.2 REG 02. car showing the tempretcher but not blowing hot air. i have change the water pump six month ago and changed thermostats vary recently. water circulations is ok. please advice. thanks
huzai, December 2008
Sounds like you need to remove the air lock by bleeding the heater.The air will be trapped at the highest point on the system,usually the heater hose.This causes water to back up behind the air bubble in the hose stopping circulation to the heater.Try removing the expansion cap fill the header tank and massage the hoses to force the air out.

DM, December 2008
link Click here to see other fixes for Vauxhall Corsa.