Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

hi you guys,
just a quick question my girl friends 1.6 16v sport had the head gasket changed not to long ago and since then the heating from the blowers dos'nt get warm unless she is stationury for awhile, iv looked through the net and scene could be problem with the heater matrix does it need bleeding?? or something like that?? if you guys could give me abit of advice would be great gets pritty dam cold
cheers guys

well when i first got my car i done wee bits and bobs and ended up needing to take all the old antifreeze out and put new stuff in and works perfect now, if that doesnt work check the pollen filter, ive never heard of a heater matrix go on a corsa.