My car heater blows cold air and car over heats slowly. I have changed the thermostat and flushed engine. havent changed the coolant temp sensor yet


Asked by Feb 02, 2014 at 03:14 PM about the 2001 Ford Mustang Base

Question type: Maintenance & Repair

4 Answers


Sounds like you're very low on coolant. Possibly because the cooling system has air in it. HTH. -Jim

2 of 2 people found this helpful.


2 of 2 people found this helpful.

That's probably the problem. You can't run without the radiator cap or the coolant will expand, as things do, when it gets hot and pour out while you're driving. So, when the engine is cold, fill the radiator to the very top then start the engine. The coolant level will go down. Leave the engine run until the upper radiator hose gets hot. That means the thermostat is open and coolant is flowing through the system. Fill the radiator again to the top and put the cap on. Now, fill the plastic recovery bottle about half way. You should be all set. Be sure your heater is on full hot as well. HTH. -Jim

2 of 2 people found this helpful.

I have done that as well. The upper radiator hose does get hot so I am thinking it is my coolant temp sensor. I cant find it on my car though.

2 of 2 people found this helpful.

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