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[VmaxGazza]

hi folks, i have heater probs, i have a better understanding of the heater controls and have read thru the topics on here about heater probs, i have very poor heat coming from vents, but some are warm, the rear vent is the best!!??, then the front drivers and passenger side vents, but the centre vents are blowing cold air,could this be vacuum problem?
i haven't owned car long, when i bought it the cylinder head gasket was blown, it was over pressurising the cooling system, and blowing water out of expansion tank, could this have damaged something connected to matrix? is there a valve that controls flow??
i also suspected that there was no thermostat, but have checked and there is one, seems as this is first place to start, you seem to recommend changing housing, is this a vauxhall only part? and what part numbers and cost ?
could my car have a few issues :-?
any ideas??

[Welung666]

Does it warm up quite quickly first thing in the morning? Is it very slow to warm up?

Could be air still in the matrix or partial blockage.

I'd change the thermostat anyway as they are only cheap

[VmaxGazza]

Does it warm up quite quickly first thing in the morning? Is it very slow to warm up?

Could be air still in the matrix or partial blockage.

I'd change the thermostat anyway as they are only cheap

i would say it heated up steadily showing around 90 on gauge
can matrix be bleed??
think thermostat is only 6 months old, replaced by mechanic when head gasket replaced