Car heater issue .

[Salty seadog]

After replacing the internal blower motor in the car the heating is somewhat sporadic. It blows hot and cold. I want a heater that blows hot all the time. It can be 10 minutes of cool air then 10 hot then cool again etc.....

Any ideas.

 

[figbat]

Air in the engine cooling system?

 

[numbnuts]

Yeah you have an air lock

 

[Drago]

Is the temperature gauge holding steady?

 

[wafter]

Airlock would be my first thought too; did you have the matrix out / break the cooling circuit at the same time as doing the blower?

Be careful at any rate - airlocks can quickly spell the end for the engine - ask me how I know

 

[sleuthey]

I’m not going to “go with the flow” so my money is on the Heater Control Valve.

 

[screenman]

I would like to know what type and age of car.