Can a bad thermostat cause no heat?
Thermostat. A faulty thermostat could be behind your car’s heater not working. If it isn’t opening up to let the coolant flow through it, the core can’t produce heat. Thermostats can also get stuck open causing the engine’s temperature to stay low.
Do you have to do a coolant flush when changing thermostat?
The cooling system is recommended to be flushed out anytime the thermostat is replaced if the coolant has not been changed or flushed recently. A thermostat does not always require the coolant to be flushed out and would be an additional charge for parts and labor.
How do you know if your heater core is bad or your thermostat?
Symptoms of a bad heater core — and solutions
- You have little or no heat inside your car.
- You smell coolant inside your vehicle.
- Your windows fog up.
- You see signs of a coolant leak under the dashboard.
- Your coolant level is dropping, or your engine is running hot.
Will a coolant leak cause no heat?
First, check your coolant level to be sure there is enough liquid in there to even get to your heater core. If your radiator is very low on coolant, you’ll get no heat. If your levels are okay, you either have a bad water pump or a thermostat that isn’t opening.
Can you change car thermostat without draining coolant?
No, the thermostat cannot be changed without draining the radiator. But honestly, it’s very easy to drain with the stopcock on the bottom right of the radiator. Once drained, the whole thing will go fast as the thermostat is VERY easy to get to.
Do I have to drain coolant before adding more?
To make sure the cooling system is completely clean before adding fresh coolant/antifreeze, use a chemical flush product. Wait for the engine to cool and drain the system as described above. If you’re using the 2 part flush product, follow the instructions to drain and fill the system and run the engine again.
https://www.youtube.com/watch?v=W9g1cLJ2k88