hitachi 1200 problem

We have a Hitachi 1200 projector. It's run maybe 60 hrs. Was doing fine until a couple weeks back.

We have the unit hanging from an overhead mount, in free space.

All of a sudden, the temp control is shutting us down because of hot bulb. The bulb isn't really the problem.

Do bulb indicators fail? My feeling is it's a bad indicator that thinks it's too hot.

What should I check?

[Blaser]

Welcome to the shack Rb!

Before thinking about defects, clean the filter that may be clogged..then see.

WIll do. I'll get back if it still isn't fixed.

Cleaned the filters. We've still got the problem. It thinks it's getting hot and shutting us down.

[lcaillo]

If the fans are operating and the airflow is not restricted, you could have a bad thermal sensor. Very common failure point on projectors.