Ok Thanks

Rick

Robert,
My input pressure is only 4.5 wc. Would this cause my intermittent full burner more so then a bad valve?

Rick

Robert, Nothing fell out, I was very careful. and understand that it always takes 20 to30 minutes to kick up to full flow everytime there is a call for heat. I was ok with that as this is in my workshop. It did'nt did'nt kick up at all the other day which led me here. Manifold gas pressure is 4"...

Hello,
Removed main burner assembly this morning and found no blockage of any kind. Removed orifice and looked down into valve and screen was clear. 24v at valve. Lit furnace and burner came on at 25% after about 20-30 minutes it kicked up to 100% flow. Yesterday it would'nt kick up at all.

Rick

Hello,
First, Thanks for the help. Its Natural Gas and will check for blockage in the morning.

Rick
Adrian,MI

Hello, I have a Miller model M1gb 056a BW with a Robert Shaw stepped gas valve 7200ercs. The gas is suppose to come on at 25% of flow then 14 seconds later kick up to 100%. The problem is it doesn't always kick up to 100%. It burns at 25% while the blower cycles on and off. I had the input gas press...