I do it all the time. My microwave has a built in feature that if it gets too hot the fan comes on and stays on until it is cool enough.

I'll second Linda. We've had the hood/microwave combo for 11 years and Steve has used the pressure cooker many times under it. Never a problem :).

Agree. Heat build-up in the enclosed area is more a concern than the small amount of steam that escapes from the PC. Just make sure your exhaust fan is working and on if it doesn't have the auto on feature.

Dave

I agree with all your comments, but I think if it is possible to manage gap a little more would be best. Else, we can also use small cooker. What do you guys say?

Here is a link that might be useful: Range Hoods

Else, we can also use small cooker. What do you guys say?

No, you can't use a small cooker when canning foods.

Dave