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Master MH-40-GFA - User Manual

Master MH-40-GFA
28 pages
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Model #s: MH-40-GFA, MH-60V-GFA,
MH-125V-GFA, MH-150V-GFA
User’s Manual and
Operating Instructions
Propane
Forced Air Heaters
IMPORTANT: Read and understand all of the directions in this manual before assembling,
starting or servicing the heater. Improper use of this heater can cause serious injury.
Pinnacle Products International, Inc. 668 Stony Hill Road #302 Yardley, PA 19067 USA
Phone: 215-891-8460 Fax: 215-891-8461 Web: www.pinnacleint.com Email: info@pinnacleint.com
Table of Contents
Specifications ..........................................................2
Unpacking ................................................................2
Product Features .....................................................2
Propane Supply / Information .................................2
Safety Information.................................................3-4
Operation ..............................................................4-5
Checking for Leaks ..................................................5
Lighting Instructions ................................................5
Storage.....................................................................5
Wiring Diagrams.......................................................6
Replacement Parts ..............................................6-7
Exploded Parts Drawing .......................................7
Troubleshooting Guide .......................... Back Cover
Warranty................................................. Back Cover
GENERAL HAZARD WARNING:
Failure to comply
with the precautions and instructions provided with
this heater, can result in death, serious bodily injury and
property loss or damage from hazards of fire, explosion,
burn, asphyxiation, carbon monoxide poisoning, and/or
electrical shock.
Only persons who can understand and follow the
instructions should use or service this heater.
If you need assistance or heater information such as an
instructions manual, labels, etc, contact the manufacturer.
221000150-11
CONSUMER: Retain this manual for future reference.
Not for use in residential living areas or
in non-adequately ventilated enclosed
spaces. Never bring or store a propane cylinder indoors.
DANGER
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CERTIFIED

Questions and Answers

  • D
    Danielle MckenzieAug 11, 2025
    Why does my Master MH-40-GFA Gas Heater stop running by itself?
    • M
      Mrs. Gina Lewis MDAug 12, 2025
      If the Master Gas Heater stops running by itself, it could be due to several reasons. First, the temperature inside the heater might be too high, causing the thermal switch to shut down. Ensure that the areas in front and behind the heater are clear of obstructions to prevent overheating. Alternatively, a damaged control valve could be the issue, requiring a replacement of the valve assembly. Lastly, accumulated dust or debris inside the heater can cause it to stop; cleaning the inside of the heater might resolve the problem.
  • M
    Mary DavisAug 21, 2025
    What to do if Master MH-40-GFA Gas Heater will not fire (ignite)?
    • J
      Jessica SnyderAug 21, 2025
      If the Master Gas Heater won't ignite, there are a few potential causes. One reason could be the absence of a spark at the module. Inspect the module wire, re-attach or tighten it if loose, and if necessary, replace the spark module. Also, inspect all other electrical components. Another possibility is an incorrect spark gap; set the plug gap to 0.16ā€ (4mm). Finally, a corroded electrode could be the culprit; in this case, replace the spark plug (Multi-Bracket Assembly).
  • D
    djacksonAug 31, 2025
    How to fix a Master Gas Heater when the fan does not turn?
    • L
      Lisa BrockSep 1, 2025
      If the fan of your Master Gas Heater doesn't turn when electricity is connected, there are several possible reasons. First, ensure that the heater is receiving electric power by checking the current at the outlet. If the voltage is correct, inspect the extension and power cords for any cuts, frays, or breaks. Another cause could be that the fan blades are in contact with the heater housing; inspect the housing for damage and ensure there are no dents obstructing the fan. Bent fan blades can also prevent the fan from turning, so straighten all fan blades. Finally, if none of these issues are present, the fan motor may be defective, requiring replacement of the Motor Assembly.

Master MH-40-GFA Specifications

General IconGeneral
BTU40, 000
Heating Area1, 000 sq. ft.
Heating Capacity40, 000 BTU
Ignition TypePiezo
ThermostatNo
Fuel TypePropane

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