| Problem |
Observed |
Possible Cause |
Solution |
| Motor starts, unit will not ignite. |
No spark. |
Igniter wire not connected. |
Remove top and reconnect. |
| |
|
Improper igniter gap. |
Readjust to .050/.055. 1/8"
|
| |
|
Faulty transformer. |
Replace circuit board. |
| |
|
Faulty spark plug/igniter cracked. |
Replace. |
| |
Spark is present. |
Insufficient propane supply. |
Over 70,000 BTU need minimum 50 to 100lb. Supply tank. |
| |
|
High limit assembly or wiring connections bad. |
Clean or replace. |
| |
|
Relay bad. |
Repair or replace. |
| |
|
Gas valve defective. |
Replace. |
| Motor does not run or runs at slow speeds |
Spark is present. |
Worn, binding motor shaft bearings. |
Replace motor. |
| |
|
Blade on motor bent or hitting housing. |
Straighten housing repair or replace fan blade. |
| |
|
Low or no voltage. |
Check electrical supply source and cord for a minimum of 105VAC. |
| |
No spark. |
On-off switch bad. |
Replace. |
| |
|
Wrong gap or bad spark plug. |
Adjust or replace. |
| |
|
Bad igniter assembly. |
Replace. |
| Motor does not start |
External causes. |
Broken or frayed wires on cord. |
Repair or replace cord. |
| |
|
Faulty in-line thermostat. |
Repair or replace. |
| |
|
Low voltage supply. |
Check electrical supply source and cord for a minimum of 105VAC. |
| |
Internal causes |
Thermostat damaged, room too warm. |
Check thermostat connections, or in area with less than 80 degrees. |
| |
|
Faulty high limit control. |
Test and replace if necessary. |
| |
|
Reset button not reset fully. |
Completely push in or replace. |
| |
|
Bad circuit board. |
Repair or replace. |
| |
|
Defective motor. |
Replace. |
| Motor runs |
Safety control trips out. |
Defective high limit control. |
Jump connections on thermo couple if it works replace high limit relay. |
| |
|
Faulty safety control/printed circuit board. |
Replace. |
| |
No flame, unit sparking, gas ok. |
Orifice restricted or blocked. |
Clean or replace. |
| |
|
Orifice not aligned. |
Check for cocked orifice or twisted in holder. |
| |
|
Orifice worn. |
Replace. |
| |
|
Gas valve defective. |
Jump-out high limit sensor if it still doesn't work replace gas valve. |
| |
No spark. |
Wiring bad or worn. |
Repair or replace. |
| |
|
Electrode bad. |
Replace. |
| |
|
Igniter not working. |
Test and replace if bad. |
| |
No flame. |
Gas supply not turned on. |
Turn on supply source. |
| Motor runs burner shuts off when safety valve button released. |
No heat shuts off. |
Poor electrical connection between thermocouple to relay. |
Clean and sand electrical connections on thermocouple. |
| |
|
Poor connections or bad high limit control assembly. |
Clean and sand electrical connections or replace. |
| |
|
Loose thermocouple connection to safety control valve. |
Finger tighten and than use wrench turn 1/4 turn more. |
| |
|
Relay bad. |
Replace. |
| |
|
Safety control valve bad. |
Replace. |
| Improper, poor flame appearance, low output |
Makes a smell and burns eyes. |
Improper gas pressure. |
Check or replace regulator. |
| |
|
Propane supply tank too small. |
Need 50-100 lb. tank for every 75,000 BTU output. |
| |
|
Plugged fuel orifice. |
Clean. |
| |
|
Obstructed air inlet or exit. |
Check for blockage at ports, clean. |
| |
|
Propane tank getting low. |
Refill. |
| Excessive flames extending out front of heater |
Flames not contained inside heater. |
Propane supply type incorrect. |
Supply correct propane supply. |
| |
|
Excessive debris in surrounding air. |
Use caution when used in area with volatile gases. |
| |
|
Defective or damaged regulator. |
Replace. |
| |
|
Defective motor. |
Replace. |
