Have you checked the coolant level? It sounds low.

Answered by Jacobandnickolas (expert)
57,318 answers provided

That sounds like a restricted heater core. You can try backflushing it with water pressure from a garden hose but it will likely ultimately need a new heater core. Get the rest of the engine flushed thoroughly before installing a new core though.

Answered by Wrenchtech (expert)
14,743 answers provided

Thank you for your response's. Yes, we checked the coolant level and it was very low. Topped it off but still blowing cold air at low speeds.

Will have to have it checked for the heater core I guess. Im not very handy with cars and was hoping for an easy fix. Was crossing fingers that topping off coolant would do the trick.

Response from donnman
1 question asked

I need you to check something. Start the engine and turn the heater on high. Let the engine warm up and feel both heater core hoses. Both should be hot. Let me know if that is the case.

Answered by Jacobandnickolas (expert)
57,318 answers provided

We have found leaks in what is a metal tube that runs from the thermostat housing up to the top of the motor. It then has spouts going off to the reservoir and the heater hose. This tube is metal and is about 3 1/2 feet with bends. It connects to the thermostat housing with a rubber piece.

I have called a few places and described this tube and some think it may be a water outlet tube, a coolent tube, or a heater tube.

Any idea on what this part is?

Response from donnman
1 question asked