capstoneclub

but within 10 seconds or so the air gets cooler. Any idea on the issue?

Allan R

Is it an AC or non AC car?

capstoneclub

70-442

svnt442

That doesn't help as 442's came with or without A/C.

My guess is that you are low on coolant if the heat is disappearing that quickly. There could also be an issue with the heater control valve (if the car came with A/C).

VC455

The root cause is low coolant flow through the heater core.

You were asked about A/C or non-A/C because A/C has an extra component in the system--a shutoff valve on the intake manifold--that may fail.

capstoneclub

I assume it must be the valve. Where is this valve located? On the passenger side rear area of the intake?

VC455

Correct.

texxas

By the way guys he answered the a/c question in the title of his first post after the question was asked.

Allan R

capstoneclub

I will give it a shot