may just be air lock in rad system which you need to expel! Just a case of opening bleed valves & rad cap & gently squeezing all the water hoses until they all feel hot & a running with hot water in them! Takes a while & requires patience = keep blowers full on & hot & keep eye on temp gauge whilst performing the manipulation! Good luck
can you please clarify what you mean, do you mean that the front heater blows cold but the rear blows hot or do you mean that when the heating is on cold it blows hot? many thanks paul
Get the air out of your heater core.
heater hoses might have been disconected
ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air? ihave a 1986 chevette that when i turn defrost on it blows out heat and when i put heater on it blows out only cold air?
you must have low coolant or a bad heater core
the heater blows warm air when fan is on low but blows cold air when fan is turn to higher setting
The most common reason a automobile heater blows cold air is the water level is low. Check the water level and fill to the appropriate level.
we changed radaitor & thermastate , now heater blows cold air
It is because your heater is having to heat up so its blowing cold air out while its heating up.This means your heater is not very efficient and it needs to be checked.
A car heater taps off engine heat. If you aren't driving, then the engine is cold and there's no heat for the car heater to use.
Whats the problem? Blows cold air with the heat settings on?
Check antifreeze level, then thermostat next, heater core last