How does intermittent heat work in a car?

Now I have intermittent heat. Sometimes I will start the car and it will take 20+ minutes for the heat to blow warm air. Other times the heat works fine for a while and then starts blowing cold air. Usually when it starts blowing cold air I begin to smell a sweet odor, possibly coolant.

Why is there no heat after a coolant flush?

Well, if you have leakage in the radiator cap, air can enter easily in the cooling system. Many times, when you flush the cooling system, gunk enters into the heater core and clogs it up. As a result, the heater core fails to provide warm air.

Which is first the AC core or the heater core?

The AC core is before the heater core and it will first cool down the incoming air (thereby dehumidify it) and the heater core can increase temperature again so the air can be in a state where it can carry even more moisture when it hits the windshield. – Evren Yurtesen Oct 13 ’16 at 7:33

Where is the heater core in a car?

Heater cores are typically situated directly in the back of dashboards. If your car is not blowing warm air into the cabin and the coolant level is fine, then you could have an issue with your heater core. If you suspect that something is amiss with your car’s heater core, watch for these signs:

What makes up the core of a heater?

Heater cores, in a nutshell, are cooling system parts that resemble compact radiators. A heater core is made up of brass or aluminum tubing that carries the hot coolant in and out, along with fans that disperse the heat released by the coolant.

Can a Dodge Caravan heater blow cold air?

3 people found this helpful. I have a 2009 dodge caravan and the heat will work for a couple of minutes and then slowly go to cold. Back does not blow heat at all only cool air and coolant is filled. I have to play with the controls by turning to defrost and then back to the vent for it to go hot again.

Why does my car heater keep blowing cold air?

If the thermostat can’t signal to the car that the engine is warm, the coolant won’t be sent over to provide heat to your heater core and the air will stay cool. Thermostats are a relatively easy and inexpensive fix, so installing a new one can get your heater working again quickly. The last common problem with car heaters is a water leak.

Can a car heater be unreliable in the winter?

Unreliable car heaters can make the cold winter months practically unbearable. Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. If one or more of these issues is present, your vehicle may blow out cool air rather than heat: