Problem- Radiant heater makes a screeching sound?

[JAckal]

Hello,
I have a tank mounted radiant double heater in my shop for auxiliary heat.
Last year it worked fine, but now after it runs a while, it makes a screeching sound and there is a blue flame coming up out of the noisy side.
I can turn it off and let it cool and then it works ok for a while.
While searching for this problem, nothing showed up.
Thanks for your help.
Jack

 

[kaymccampbell]

Spider webs in the burner or a plugged orifice? Or maybe a spider? Blast down all the holes with compressed air first. Then give it a try.

 

[JAckal]

Thanks ,
I'll do that.

 

[gmcgeo]

Could be the tank is overfilled by whoever filled it last, or regulator problem.

with you saying after it runs for a bit then does it, sounds like over pressure after getting hot.

where exactly is this "noisy" part that you trying to explain?

 

[JAckal]

Could be the tank is overfilled by whoever filled it last, or regulator problem.

with you saying after it runs for a bit then does it, sounds like over pressure after getting hot.

where exactly is this "noisy" part that you trying to explain?

It was filled by the same place. It's a 100 pound tank. They always fill it until the liquid come out the overflow and then shut it off.
This tank has already been ran for 10+ hours.

The regulator is built in to the hi-med-low valve.
When it screeches, the radiant disc stops glowing and a weak-blue flame come out the top of the radiant disc reflector.

As for the time it usually does it after it has ran for only 2 or 3 minutes.

 

[gmcgeo]

It was filled by the same place. It's a 100 pound tank. They always fill it until the liquid come out the overflow and then shut it off.
This tank has already been ran for 10+ hours.

The regulator is built in to the hi-med-low valve.
When it screeches, the radiant disc stops glowing and a weak-blue flame come out the top of the radiant disc reflector.

As for the time it usually does it after it has ran for only 2 or 3 minutes

if its a 100# tank then you need to not be using that tank inside.

And they need to legally fill it with weighing the tank not using the bleeder valve.

If it has a multivalve and they fill it with a truck then its a different story.

It still sounds like it has a regulator issue and possible oxygen problem. you could try cleaning it out with air. but lightly.

Again, very very unsafe using 100# tank with that mounted on top inside a building.

yes you have done it for years, it only takes one time for the tank to let off pressure and BOOM