Question about Heating & Cooling
I have a Rheem Criterion II Gas Furnace that will start up and ignite and then after 5 seconds will cycle down. It will do this three times and then turn off, never producing any heat. I turned off the power and cleaned the flame sensor (L shaped bar on first of four burners). Nothing changed. Any additional cleaning suggestions or suggested replacement parts? Thanks!
You should have a diagnostic flash code to read that will tell you which avenue to explore. look at the bottom panel there will be a sight glass look in and count the flashes a legend in on the back side of the blower door.
Posted on Nov 23, 2014
Check air filter is clean , jump out pressure switch see if it lights
Posted on Jan 09, 2013
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Posted on Jan 02, 2017
SOURCE: Have a rheem criterion II. Model
The way it lights is that the gas is spread from one burner to the next by either a flame tray or small holes drilled in the burner tubes. If the flame does not get all the way across the burner tubes within a few seconds, the unit goes out on failure. Clean and inspect each burner tube, not just the orifice. Clean any tray that connects the burners. You can use a small wire brush or tooth brush but be careful near the glow igniter as it is very fragile.
Posted on Dec 12, 2009
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