Why does my radiator blow cold after a flush?

While I was flushing the radiator it was blowing very hot and now that I have finished the flush and filled with coolant it blows a little warm for about five minutes and then it starts blowing cold. Please help! have the same problem? Gunk freed up in the cooling system when you flushed it probably got into the heater core and clogged it up.

What causes a heater to blow cold air?

The following are some issues that may be causing the heater to blow cold air: Low coolant levels. A plugged/clogged heater core. A faulty thermostat (thermostat that is stuck) Broken blower and/or blower motor. Heater core bypass hoses that have leaks.

Where does the coolant go after flushing the radiator?

Under the hood, there are two cooling system hoses going to the firewall. One is an inlet going into the heater core, the other is an outlet. Take both hoses off, point one somewhere where coolant coming out will not get on important electrical stuff.

How does a hot water heater get clogged up?

Gunk freed up in the cooling system when you flushed it probably got into the heater core and clogged it up. Under the hood, there are two cooling system hoses going to the firewall. One is an inlet going into the heater core, the other is an outlet.

Why does my car heater keep blowing cold air?

If any of the engine cooling system components are damaged, this will cause the car to overheat. The following are some possible problems that may occur with the engine cooling system: If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well.

What happens if your car radiator is too hot?

If the engine is too hot, the thermostat will open to allow the flow of coolant into the radiator. The radiator will then cool it down before it is pumped back through the engine block by the water pump.

How does the water pump in a radiator work?

The water pump takes coolant from the lower radiator tank and pumps it through passages to cool the engine. The directional flow of the coolant is to the engine block, cylinder head, and then to the radiator outlet. Along the way, the coolant picks up heat and as it flows back to the radiator.

What to do if your car heater is not working?

If your car is overheating and/or your heater is not working, it should be inspected and diagnosed as soon as possible to avoid causing damage to the engine and the inconvenience of operating the car under this condition. The statements expressed above are only for informational purposes and should be independently verified.