Monessen Hearth HBDV400N/PV7 User Manual

48

1.  Spark ignitor will 

not light pilot after 
repeated triggering of 
piezo.

 

.  Pilot will not stay lit 

after carefully follow-
ing lighting instruc-
tions.

3.  Pilot burning, valve 

knob turned to “ON”, 
switch is turned to 
“ON” or “RS”, but 
burner will not ignite. 

A.  Wire disconnected.

B.  Defective ignitor.

C.  No gas or low gas pres-

sure.

D.  No Propane/LPG in tank

A.  Defective thermocouple

B.  Defective valve

A.  Defective switch, wall 

switch, remote control or 
wire

B.  Pilot flame too small

C.  Defective or malfunction-

ing thermopile

D.  Defective valve

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.

A.  Check that thermocouple flame impinges on thermo-

couple. Clean and/or adjust pilot for maximum flame 
impingement.  Ensure that the thermocouple connec-
tion 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.

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 35 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.