Troubleshooting Guide - Master MH-150NGT-GFA-A Manual De Usuario E Instrucciones De Funcionamiento

Locating Your Serial Number:
Your serial number can be found on a white label on the right side cover of your heater. It will begin
with the letter "G" followed by 9 digits. For Example: G181200001. Have your Serial Number ready be-
fore calling customer service at 800-641-6996.
Problem
Fan does not turn when
electricity is connected.
Heater will not fire (ignite).
Heater stops running
by itself.
© 2018 Pinnacle Climate Technologies, Inc.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING,
CONNECTED TO A POWER SOURCE, OR WHILE CONNECTED TO A

TROUBLESHOOTING GUIDE

Possible Cause(s)
1. No electric power to heater.
2. Blades of fan in contact with
heater housing.
3. Fan blades bent.
4. Fan motor defective.
1. No spark at module.
2. Incorrect spark gap.
3. Corroded electrode.
1. Temperature inside heater
is too high, causing thermal
switch to shut down operation.
2. Damaged control valve.
3. Dust or Debris accumulated
in heater.
FUEL SOURCE
1. Check current at outlet. If
2. Check housing for damage. Be
3. Straighten all fan blades.
4. Replace motor assembly.
1. Inspect module wire. Re-attach
2. Set plug gap to 0.16" (4 mm).
3. Replace spark plug
1. If the heater input or output
2. Replace control valve.
3. Clean inside of heater.
10 Natural Gas Forced Air Heater User's Manual
Solution
voltage is correct, inspect
extension and power cords for
cuts, frays or breaks
sure there are no dents in the
housing obstructing the fan.
or tighten if loose. Inspect
spark module and replace if
necessary. Inspect all other
electrical components.
(multi-bracket assembly).
is restricted, the inside
temperature can become too
hot. Keep the areas in front
and behind heater clear of
obstructions.