He was not having any issue, he was just trying to help by offering a source for a part.

If your car is "blowing hot" at times, answer these questions:

1) Does the air always blow hot?
2) If not always, how often/when does it go from hot to cold or cold to hot?
3) Is it all four vents going hot or just one side?
4) Are there any other electrical issues going on? Any instrument panel warning lights on all the time?
4A) Do any instrument panel warning lights come on when the air blows hot?

The cuase can be a bad/sticky duovalve, failing power lead to the duvalve, issue in the climate control module, failure with the A/C clutch to stay engaged or other faults.
Most of the time, this is not a hard issue to resolve, if the one chasing it understands how the system works.