it was fine before the water pump was done garage says it is just a coincidence? but could the water pump effect the heating?
probably an air lock in the system, cooling systems need bleeding after fitting new components, try taking the cap off the tank and let the car fully get hot , it may blow the trapped air out as the coolant circulates
no it's not... I would take it back and make them fix it right
I am going to think your fan is working and switch. If they changed the water pump, they might have broken some debris or sealant that is clogging your heater intake hose or heater core. I would start with finding the intake and return hoes for the heater core and back flush the heater core. Did this to my old truck and the heater worked really good after that. You did not say what year the car was does it have its own belt for the water pump? is that in working order? GL
What is not working about your heater? Is the air blowing, but it's not warm air? Or is the air not blowing at all? The air not blowing is not related to the water pump. The air not getting warm very well could be related to the water pump. The water pump pushes water all throughout the cooling system- including the heater core- which is where you get your warm air from for your heater. Try what was suggested about running it a while with the radiator cap off to bleed out all air. If that doesn't help, I'd find another mechanic to look at it for you and take their findings back to the folks that put the water pump on. (as a heads up, this also could be an air blend door, which switches the air flow in your car from hot to cold. These doors can get stuck and not give you the air you desire. This would not be water pump related.) :)
