dwade154
New member
- 10
- 0
- 1
- Location
- House Springs/Mo
Won at auction.
Cleaned out the tank and blew out all lines/new filter and ran new fuel to burner- as previous posts suggested.
Upon inspection/operation of the H140 I was getting raw unburnt fuel coming out the exhaust pipe in “all” settings-Ventilation, Cool down and Heat mode. Made a mess of things.
Initially, I tried to verify ignition arc through the glass port and could see a small flame in there trying to get going in the cool down setting and heat mode. It was a faint flame I observed. I was sure I had too much fuel overwhelming the arc igniter.
The unit was producing a bit of heat.
I disassembled the front of the heat exchanger and observed raw fuel in the bottom of combustion chamber. A lot. About an inch deep.
I removed/cleaned the burner assembly and verified arc ignition was present outside the unit. Arc ignition was present in the cool down and heat modes only, outside the unit, with the doors and top on. I learned via the diagram- The internal air pressure switch (electrically) must be closed so the arc ignition functions.
Upon further diagnostics, the fuel line to the burner had active constant fuel pressure in all settings-Vent, cool down and heat mode. I had the fuel line to the nozzle disconnected and draining in a bucket inside the burner. The burner assembly was removed at this time.
I’m assuming the fuel solenoid (L1) is stuck in the open position and supplying fuel at all times to the burner??!
But what is unclear in the Manual (pg 0003 00-3) is how fuel gets to the burner after the fuel solenoid (L1). I’m not sure if this is a pump issue or not.
My assumption is that the burner only requires fuel in the heat mode but my unit is getting constant fuel in all settings. Is this correct?
Does the fuel solenoid supply fuel to the nozzle and the selector switch controls the fuel solenoid? If not, what controls the flow of fuel to the burner?
The solenoid did not show a short upon checking the ohms and I could not get a voltage readin any setting. I stripped the black wires to the solenoid back and put alligator clips on the wires.
I can get a new solenoid for 19$ on eBay
I’d appreciate any experience or advice
https://www.liberatedmanuals.com/TM-9-4520-271-14.pdf
Thank you,
Daniel
Cleaned out the tank and blew out all lines/new filter and ran new fuel to burner- as previous posts suggested.
Upon inspection/operation of the H140 I was getting raw unburnt fuel coming out the exhaust pipe in “all” settings-Ventilation, Cool down and Heat mode. Made a mess of things.
Initially, I tried to verify ignition arc through the glass port and could see a small flame in there trying to get going in the cool down setting and heat mode. It was a faint flame I observed. I was sure I had too much fuel overwhelming the arc igniter.
The unit was producing a bit of heat.
I disassembled the front of the heat exchanger and observed raw fuel in the bottom of combustion chamber. A lot. About an inch deep.
I removed/cleaned the burner assembly and verified arc ignition was present outside the unit. Arc ignition was present in the cool down and heat modes only, outside the unit, with the doors and top on. I learned via the diagram- The internal air pressure switch (electrically) must be closed so the arc ignition functions.
Upon further diagnostics, the fuel line to the burner had active constant fuel pressure in all settings-Vent, cool down and heat mode. I had the fuel line to the nozzle disconnected and draining in a bucket inside the burner. The burner assembly was removed at this time.
I’m assuming the fuel solenoid (L1) is stuck in the open position and supplying fuel at all times to the burner??!
But what is unclear in the Manual (pg 0003 00-3) is how fuel gets to the burner after the fuel solenoid (L1). I’m not sure if this is a pump issue or not.
My assumption is that the burner only requires fuel in the heat mode but my unit is getting constant fuel in all settings. Is this correct?
Does the fuel solenoid supply fuel to the nozzle and the selector switch controls the fuel solenoid? If not, what controls the flow of fuel to the burner?
The solenoid did not show a short upon checking the ohms and I could not get a voltage readin any setting. I stripped the black wires to the solenoid back and put alligator clips on the wires.
I can get a new solenoid for 19$ on eBay
I’d appreciate any experience or advice
https://www.liberatedmanuals.com/TM-9-4520-271-14.pdf
Thank you,
Daniel
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