Monessen Hearth 6000DV User Manual

43

1.  Spark ignitor 

will not light 

pilot after 

repeated trig-

gering of 

piezo.

A.  Wire disconnected.

B.  Defective ignitor.

C.  No gas or low gas pressure.

D.  No Propane/LPG in tank

A.  Open door and check to make sure wire is connected to ignitor.

B.   Check for spark at electrode and pilot. If no spark and electrode 

wire is properly connected, replace pilot assembly. 

C.  Check remote/manual shut off valve from fireplace. Low pressure 

can be caused by bent lines, restricted lines, low pressure line 

pressure. Consult with plumber or gas supplier. 

D.  Check Propane/LPG tank. Refill tank.

2.  Pilot will not 

stay lit after 

carefully fol-

lowing light-

ing instruc-

tions.

A.  Defective thermocouple

B.  Defective valve

A.  Check that thermocouple flame impinges on thermocouple. Clean 

and/or adjust pilot for maximum flame impingement.  Ensure that 

the thermocouple connection at the gas valve is fully inserted and 

tight. 

  Disconnect the thermocouple from the valve, place one millivolt 

lead wire on the tip of the thermocouple and the other meter lead 

wire on the thermocouple copper lead. Start the pilot and hold the 

valve knob in. If the millivolt reading is less than 15 mV, replace 

pilot assembly. 

B.   If thermocouple is producing more than 15 mV, replace faulty 

valve.

3.  Pilot burning, 

valve knob 

turned to 

“ON”, switch 

is turned to 

“ON” or “RS”, 

but burner will 

not ignite. 

A.  Defective switch, wall switch, 

remote control or wire

B.  Pilot flame too small

C.  Defective or malfunctioning ther-

mopile

D.  Defective valve

A.  Check switch and wire for proper connection. Place jumper wires 

across terminals of switch. If burner comes on, replace defective 

switch.If the switch is OK, repeat the same procedure on remote 

control If burner comes on, replace remote control. 

  Place jumper wire across wire at gas valves (terminals marked TH 

and TP/TH). If burner comes on, wires are faulty or connections 

are bad. Replace wire.

B.   If pilot flame is not close enough to the thermopile, adjust pilot 

flame.

C.   Check thermopile wire connections to make sure all are tight and 

that the thermopile is fully inserted into pilot assembly.  Check 

thermopile with a millivolt meter. Connect leads to TP and TP/TH 

terminals on the control valve. If meter reading is below 325 mV, 

replace pilot assembly.

D.   Turn valve knob to “On” and switch to “ON.” Take a reading at 

the thermopile leads (TP & TP/TH) on the valve. If the meter 

reads greater than 175 mV and the burner does not light, replace 

defective valve.

4.  Frequent pilot 

outage prob-

lem. 

A.  Pilot flame may be too high or too 

low, causing pilot safety to drop 

out

A.  Clean and adjust the pilot flame for maximum flame impingement 

on thermocouple.

5.  The pilot and 

main burner 

extinguish 

while in oper-

ation

A.  Inner vent pipe leaking exhaust 

gases back into system 

B.  Horizontal vent improperly pitched 

C.  Improper vent cap installation

A.  Check for flue product leak. Replace defective pipe section.

B.  Check horizontal-venting piping is running upward 1/4" per foot. 

Do not run the pipe level or downward. 

C. Check for proper installation and freedom from debris or blockage