Question about Heating & Cooling
Dayton: Mod. 3E133A, Ser. 40817906076.
Does this model use a flame sensor with a combination ignitor and flame sensor.
The unit will light and stay running as long as the sparking device is still sparking. Once the ignitor stops sparking the flame goes out. Does it have a flame sensor built in with the ignitor?
It has a ignitor wire from the circuit board, then another wire from the circuit board to the ignitor. Is this a common wire, ground wire or sensor wire?
Could you send me a schematic for the ignition system?
I had the same problem but it turned out to be a cracked housing on the back of the electric motor. The way the fuel is injected is by presure flowing through the front of the injection nozle therefore pulling fuel from the tank. The electric motor also acts as a air pump. On the back of the motor is a chambor that has a plastic cover. My cover was cracked causing a pressure leak and therefore not enough fuel getting to the knozle. I verified this by removing the air line off the back of the motor and pressureizing it using compressed air while turning on the unit. It worked! At that point I realize I had a leak and started searching. I checked the rubber line and then removed the back cover to find a rather complex air pumping system. That's when I found the crack in the back cover. Fixed it with on epoxy and now it works perfect. Took me over 4 hours to figure this out.
Posted on Dec 27, 2008
Yes, the flame sensor is part of the intermittent pilot assembly. Check the following: make sure all grounding wires are secure and no corrosion is built up on them. Clean or replace the pilot assembly, also clean out the orifice with a very small drill. Make sure the sensor is in the flame and make sure the pilot tube is not leaking gas reducing the gas pressure at the pilot.
If it continues, you will have to replace the ignition control.
Posted on Nov 26, 2007
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Posted on Jan 02, 2017
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