I have a Monitor 422. It will come, on fire up and the fan will come on like normal. After it clicks into high burner status it will run for about 2 minutes and then it begins "thumping" like it is out of fuel. I have cleaned all the filters and I replaced the fuel pump but it still does the same everytime. I restart it and it will pump the fuel in and burn but again it will burn on high for about 2 minutes and start "thumping" again and will shut down. It seems to get the fuel just fine in the beginning. Any ideas on what the next step should be? Thank You!
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Has anyone had an occurrence of a Laser 730 or 731 over firing?
The top of the heat chamber and the heat exchanger glow red on high when this occurs....
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