This can be caused by several things:
1. The inline gas valve running to the the heater is OFF. Turn the valve ON.
2. The gas control knob on the heater is not exactly in the PILOT position. Unless the knob bottoms
out and you feel strong pressure (other than spring pressure) pushing back at you. It's not exactly
in the PILOT Position. Once the pilot lights, hold the control knob in for 30 seconds to 60 seconds
to allow the Thermocouple to full heat.
3. The pilot is dirty and needs to be cleaned, as do the burners.*
4. The LP Gas Tank is empty or to low to maintain te proper gas pressure.
* Here is a link to a demonstration on how to properly clean the pilot & burners.
http://www.desatech.com/techDocs/Cleaning%20Demonstrations.pdf
I hope this helps you to troubleshoot & solve the problem. Thanks for choosing FixYa.
Pilot light comes right on but immediately goes off when I turn thr knob on. I was told that large propane tanks have oil in the gas and a filyer shound be used. The small coleman type spin on cans don't have oil in the gas. Unknown if this is true. Ron
SOURCE: Kozy World propane wall heater
The ceramic "bricks" need to be heated evenly. Since 3 are good, I would have to assume the other two have a restriction. Maybe a spider in the orifices, If you can access the "jet" where gas comes out, try using a paper clip or something similar to clear any blockage. If that wont do it, pull the burner, remove each orifice and clear. Good Luck
Testimonial: "Thank you very much for the info. There was some trash around the opening of the 2 jets. I cleaned them out with a tip cleaner and now it works fine."
SOURCE: pilot light is very small
Probably dust in the pilot safety ODS chamber. I like to flush the pilot with rust buster. but shop air will work. More here
If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61
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