Little giant 3ht not lighting

[Cleanworks]

My lg3ht hasn't been working properly lately. Very slow for the main burner to come on. Took the burner out and cleaned it. When I turn it on now, burner fires right up, very powerful. Reaches temperature and shuts off. When I pull the trigger on the wand, I hear the thermostat click but the burner comes on with a very weak flame out of the jets. If I shut it down and refire it, it comes on fine but then repeats with the weak flame. Any ideas?

 

[Desk Jockey]

If its clean maybe its the Unitrol valve?

 

[Cleanworks]

Seems like a blockage somewhere. I replaced the regulator. No difference.

 

[Nate The Great]

This is the one you tweaked the T-stat?

My guess is either low on propane, the pilot light orifice is clogged.. I've had a Bbq tank with a bad valve... It'd fook up some shit...

 

[Desk Jockey]

http://www.jondon.com/thermostat-control.html

I think it's a Unitrol U110

 

[Desk Jockey]

Heaters are for barbecue grills. Get HE!

 

[Cleanworks]

This is the one you tweaked the T-stat?

My guess is either low on propane, the pilot light orifice is clogged.. I've had a Bbq tank with a bad valve... It'd fook up some shit...

Pilot light is nice and strong. I didn't tweak this one. That was my 2ht that I tweaked. Really made a big difference. Is it possible to get an air lock in the main burner?

 

[Cleanworks]

Heaters are for barbecue grills. Get HE!

I am tempted to sell all my old junk and get a new legend.

 

[Nate The Great]

Pilot light is nice and strong. I didn't tweak this one. That was my 2ht that I tweaked. Really made a big difference. Is it possible to get an air lock in the main burner?

It's possible.. Did you try a different tank?

 

[Cleanworks]

Different tank, different reg. Different hose. Seems to be in the control or main line.

 

[Cleanworks]

Everything works perfect on initial firing. Only when it has to refire does it happen.

 

[Nate The Great]

Stumped me than.. When in doubt call Les Judson... My new #4LG heater had a problem with the pilot orifice.. It'd fire up but blow out and not stay lit on a commercial job... Real PITA.. Never had a control go out except for my #2 I bought but the OG owner broke it when it fell..

Bad tank valve as well with symptoms like you mentioned..

 

[Nate The Great]

I'd change out the thermo coupler for the pilot light, and check for rubbish in the line...

 

[Cleanworks]

Stumped me than.. When in doubt call Les Judson... My new #4LG heater had a problem with the pilot orifice.. It'd fire up but blow out and not stay lit on a commercial job... Real PITA.. Never had a control go out except for my #2 I bought but the OG owner broke it when it fell..

Bad tank valve as well with symptoms like you mentioned..

I'll call Les tomorrow. I have it on a work bench for now. Tomorrow is just portable work.

 

[Nomad74]

Not a little giant, but when my Northstar igniter wint out it almost caught my van on fire. Totally saturated everything in my van with soot when it decided to finally fire off. Here is an old video of the repair.

 

[Andy]

check your valves. your valve is allowing enough propane through for an initial burn but then can't keep up on second burn.

 

[Larry Cobb]

I would say the Unitrol 110 control.

Freezing can damage them.

 

[Cleanworks]

I couldn't get ahold of Les today so I called lg in Texas. They advised me to check gas pressure. Bought a gauge and will do that this afternoon.

 

[Cleanworks]

Problem solved. Turns out the new regulator I had made up, was made up backwards. Put the old one back on and it is flawless.

 

[Desk Jockey]

Figures....you fooked it up!

 

[Kenny Hayes]

Sweet

 

[Cleanworks]

Figures....you fooked it up!

That was the propane company who assembled the reg and fitting.

 

[Desk Jockey]

That was the propane company who assembled the reg and fitting.

Uhh huh. There's always a weak link in the chain!

Glad you got it figured out!

 

[Cleanworks]

It's probably because I wanted a easy screw off fitting. The fitting is 1/4 inch and the lead to the heater is 3/8 inch. Only one way to put it together. The wrong way.

 

[yuzu123]

Problem solved. Turns out the new regulator I had made up, was made up backwards. Put the old one back on and it is flawless.View attachment 76077

I have the same Regulator, the picture is correct? i mean the direction is the flow out. Also the fittings are not the same so you can't make the installation wrong. But the burner of my LG recently bought is not working, i replace it with 2 stages Regulator still not working.