Forced Air Propane Troubleshooting

7/10/2014 9:52 PM

For information on how to troubleshoot your Forced Air Propane heater, download the troubleshooting guide.

Motor starts, unit will not ignite No spark 1 Igniter wire not connected Remove bottom panel and reconnect
2 Improper igniter gap Readjust to .050/.055
3 Faulty Piezo or ignition module Replace
4 Faulty spark plug/igniter electrode cracked Replace
Spark is present 1 Insufficient propane supply Over 70,000 BTU need minimum 50 to 100lb. supply tank
2 High limit assembly or wiring connections bad Clean or replace
3 Thermoelectric valve defective  Clean or replace
4 Worn, binding motor shaft bearings Replace motor
Motor does not run or runs at slow speeds Spark is present 1 Blade on motor bent or hitting housing Straighten housing repair or replace fan blade
2 Low or no voltage Check electrical supply source and cord for a minimum of 105VAC
Motor does not run or runs at slow speeds No spark 1 Low or no voltage Check electrical supply source and cord for a minimum of 105VAC
2 Bad igniter assembly Replace
3 Broken or frayed wires on cord Repair or replace cord
4 Faulty in-line thermostat (170 and 400 only Repair or replace  
Internal causes 1 Defective high limit control Jump connections on thermo couple if it works replace high limit switch
2 Defective motor Replace
3 Bad circuit board Repair or replace
Motor runs Safety control trips out 1 Faulty safety control/printed circuit board Replace
No flame, unit sparking, gas ok 1 Orifice restricted or blocked Clean or replace
2 Orifice not aligned Check for cocked orifice or twisted in holder
3 Orifice worn Replace
4 Gas safety valve defective Replace gas safety valve
5 Wiring bad or worn Repair or replace
No spark 1 Electrode bad Replace
2 Igniter not working test and replace if bad
3 Gas supply not turned on Turn on supply source
Motor runs No heat/
shuts off
1 Poor connections or bad high limit control assembly Clean and sand electrical connections or replace
2 Loose thermocouple connection to valve Finger tighten and than use wrench turn 1/4 turn more
3 Relay bad Replace
4 Safety control valve bad Replace
5 Improper gas pressure Check or replace regulator
Improper, poor flame appearance, low output Makes a smell burns eyes 1 Propane supply tank too small Need 50-100 lb. tank for every 75,000 BTU output
2 Plugged fuel orifice Clean
3 Obstructed air inlet or exit Check for blockage at ports, clean
4 Propane tank getting low Refill
5 Propane supply type incorrect Supply correct propane supply
Excessive flames extending out front of heater Flames not contained inside heater 1 Excessive debris in surrounding air Use caution when used in area with volatile gases
2 Defective or damaged regulator Replace
3 Defective motor Replace
Posted in Product FAQs By

Melissa Sawmiller