Originally Posted by SubaruLover
So I confirmed that the thermostat was replaced.
Now that the weather is getting cool I haven't had any issues with the car over heating for about 3 weeks.
Also now that it is getting cool I have no heat for the interior of the car.
The two possible causes I have come up with are:
1) A clog causing reduced flow which is more noticeable at high RPMs when the higher flow rate is restricted
2) A mechanical failure of the pump causing reduced flow at higher RPMs
What is the best way to clear or find a clog?
What do you mean you have no heat? Like the heat and defroster in your car is not blowing any air? If that is the case, then you need to check your blower motor, blower motor resistor, and the blower motor relay. If you can confirm this, I can walk you through the steps on how to get this fixed. (My heat just went out and it turned out to be the blower motor relay, I can guide you through how to test everything)