burner problem

Mark Wendt

Mark Wendt

New member
I have a wayne burner that quit working (bad fuel pump) replaced the pump (suntec) and filter and fuel lines as they were in bad shape now it still won't fire. Its pumping fuel but none goes into the burner, when you hit the trigger I get fire at the transformer and if i pull the plug off the solenoid and hit the trigger i get 11 volts but no fuel from pump to burner.
 
Start following the fuel from the start. From tank to filter to pump etc. almost sounds like the tip is plugged. if the fuel isnt flowing it wont fire
 
its pumping fuel from tank through filter and pump and back to tank, but don't get any from pump to burner. Pressure switch and all appear to be working, could it be the high limit switch?
 
Change the nozzle or at least take it apart and make sure its not clogged. If you bypass the pressure switch and put power right to the solenoid it should fire up or you should hear it clicking if the machine is off.
 
After talking to you!!! Lol sounded like me all over again. Thanks again for the after hour call to get me up and running
 
if i undo the fuel line from the side of the burner nothing comes out of the line, so i dont think its the nozzle.
 
Get a magnet...any old magnet will do. Take the solenoid coil off the post, energize the burner, and drag the magnet up and down the post. If you get fuel out the line, the solenoid is okay. 11 volts should activate the coil. Maybe the coil itself is bad. Get a thin screwdriver, energize the burner, squeeze the gun to call for heat, stick the screwdriver in the post hole of the coil and see if it will "grab" the screwdriver.
 
to check the solenoid coil with a volt-ohm meter..
set the meter for Rx100 and touch your meter leads together..
you get 000 which is a no resistance reading..
now touch the leads to the terminals on the solenoid coil..
you should get "some" resistance, if the coil is NOT burned out.
..like 60 ohms ? It's been a while since I (had to) check one. :)
the point is, it is either a "load", or an open circuit.

If it's good,
set that voltmeter for 20 volts, and stick the leads into the connector that you removed from the coil..
when you energize the flow/pressure switch and have the temp control turned up,
you should get 12 volts or better on a 12 volt system...
not 11 ! unless your battery is low, from a cahrging issue,
Or, you could have a switch with burned ccontacts..
especially pressure switches are overloaded, the way several manufacturers "Miswire" things at the factory.
If your pressure switch is used to power tthe HV and fuel solenoid,
the starting-currrent of the HV kills switches, then the switch kills the HV.
several mfr's have this cancer.
 
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It sounds like a fuel solenoid issue to me, It could be the solenoid itself or one of the other switches in line (pressure or temp switch). Check the whole circuit to see if you are getting power to the solenoid.
 
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