2005 MG ZR heater blowing cold air

Car: MG ZR
Year: 2005
Variant: 1.4
Categories: Leaks & Noises
my heater has been blowing cold air past few weeks , car is not over heating its running juts under half temp as normal and not using water . The pipes are all hot up too heater valve this is open and working fine I have also bled the system so their is no air in system , their is no white substance in oil filler cap so I do not think its the head gasket any solutions ? as I do not want 2 replace water pump , thermostat then head gasket just for it still too not work !!
Posted: Nov 1, 2010 (13 years ago)
It could be the heater bypass valve , this shows you it here .

http://forums.mg-rover.org/showthread.php?t=341903

or if not that , the heater flap , see here.


mg-rover.org/showthread.php?t=338911


Should help you .
Posted Nov 1, 2010 (13 years ago)

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