
OFP42N/OFP42LP Troubleshooting the Gas Control System
NOTE: Before troubleshooting the gas control system, be sure external gas shut off is in the “ON” position.
Problem Possible Causes Corrective Action
Spark igniter will not
light
Defective or misaligned electrode at
pilot.
Check for spark at electrode and pilot: if no spark and electrode
wire is properly connected, replace igniter.
Defective igniter
(push-button)
Using a match, light pilot, If pilot lights, turn off pilot and push
the red button again. If pilot will not light, check gap at electrode
and pilot- gap should be 1/8” to 1/4” to have a strong spark.
Pilot will not light Safety Switch is Depressed. Clear any obstructions and make sure Lever Arm is not bent or
damaged (See Panel 2 page 10 for Safety Switch Location) .
Pilot will not stay lit
after carefully following
lighting instructions.
Defective Valve Magnet Turn valve knob “ON”, place wall switch “ON”. Millivolt meter
should read greater than 100mv. If the reading is okay and the
burner does not come on, replace the gas valve.
Pilot burning, no gas to
burner, Valve knob
“ON”, Wall Switch “ON”
Wall Switch or wires defective Check wall switch and wires for proper connections. Jumper
wire across terminals at wall switch. If burner comes on, replace
defective wall switch. If okay, jumper wire across wall switch
wires at valve. If burner comes on, wires are faulty or
connections are bad.
Generator may not be generating
sufficient voltage
Check generator with millivolt meter. Take reading at generator
terminals of gas valve. Should read 325 millivolts minimum
while holding valve knob depressed in pilot position and wall
switch “OFF”. Replace faulty generator if reading is below
specified minimum.
Plugged burner orifice Check burner orifice for stoppage and remove.
Defective automatic valve operator Remove all switch wires from gas valve. Install jumper wires
from TPTH and TH terminals of gas valve. Turn valve “ON”. If
main burner does not light, replace valve.
Frequent Pilot outage
problem
Pilot flame may be too low or blowing
(high) causing the pilot safety to drop
out.
Clean and/or adjust pilot flame for maximum flame impingement
on generator .
Windy Conditions. Close Pullscreens
OFP42N/OFP42LP -Cleaning -
It is recommended to annually inspect and clean the unit to prevent malfunction and / or sooting. This operation
should be performed by your dealer or a qualified technician.
-Carefully remove contents of firebox (log set, Rocks, Glass, etc.). Gloves are recommended.-
Annual Cleaning / Inspection
• Do not use cleaning fluids to clean logs.
• Use a soft bristle brush or a vacuum with brush
attachment.
• Vacuum loose particles and dust from burner and
valve
• Inspect Burner Plate, Pilot, Valve, and Mixing Sleeve
for spider webs or other blockages.
• Replace contents of firebox. Refer to the
appropriate page in this manual for proper
placement of contents, such as logs.
Warning
Turn off Unit and allow to cool before cleaning. Only a
qualified service technician should service and repair
appliance.
(Burner Assembly shown removed for clarity.)