check system isnt frozen,plenty a/freeze?is thermostat opening ok,feel the top hose and radiator,if they are getting warm good chance it is opening,are hoses to heater radiator getting hot?if so the heater control valve may be at fault,have a look in reservoir and rev the engine,is the water circulating ok?if not water pump may be at fault,just some things to check
cdc, December 2010
