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Mr. Heater Portable Buddy MH9BX - User Manual

Mr. Heater Portable Buddy MH9BX
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COMPACT PROPANE HEATER
Part No. MH9BX
Portable Buddy
User Manual and
Product Specications
by PRIMUS
®
Image for representation purposes only and may differ from actual product.
DO NOT: Operate this appliance before reading the instruction booklet
DO NOT: Place articles on or against this appliance
DO NOT: Store chemicals, ammable materials or spray aerosols near this appliance
DO NOT: Operate with panels, covers or guards removed from this appliance.
DO NOT: Operate in an enclosed area without ventilation
DO NOT: Operate in a boat, caravan or tent
IMPORTANT
Read these instructions for use carefully. Familiarise yourself
with the appliance before connecting it to its gas container.
Keep these instructions for future reference.

Table of Contents

Questions and Answers

  • M
    Melissa KellerJul 26, 2025
    Why does my Mr. Heater Portable Buddy MH9BX keep shutting off?
    • J
      Joshua MorrisJul 26, 2025
      Your Mr. Heater Gas Heater might be shutting off due to several reasons. The pilot could be blocked, so cleaning the pilot might help. The tip-over switch may have been activated if the heater was bumped, in which case you should try re-lighting it. Also, the regulator might be defective, requiring a replacement. In some cases, internal contamination might be the cause, necessitating the replacement of both the control valve and regulator.
  • C
    Christopher HubbardAug 1, 2025
    What to do if Mr. Heater Portable Buddy MH9BX Gas Heater spark is working but pilot won't light?
    • C
      Crystal RamirezAug 2, 2025
      If the spark electrode in your Mr. Heater Gas Heater is producing a spark but the pilot light won't ignite, there could be a few reasons. First, ensure that there is gas supply to the heater by installing a disposable cylinder or connecting a hose and filter, and then turn on the valve at the remote cylinder. Also, check that the gas control knob is properly aligned to the “PILOT” position and fully depressed. Another possibility is that the pilot is blocked by a spider web or dirt. If so, it should be cleaned.
  • T
    timothy68Aug 7, 2025
    How to fix Mr. Heater Gas Heater if pilot light goes out after releasing the knob?
    • M
      Marc CarrollAug 7, 2025
      If the pilot flame on your Mr. Heater Gas Heater doesn't stay lit after you release the knob, it could be due to a few reasons. Ensure that the control knob in the “PILOT” position is completely depressed and held long enough to purge air from the lines. Also, check that the pilot flame surrounds the thermocouple; if not, clean the pilot. A defective pilot assembly could also be the cause, requiring replacement. Finally, check if the tip switch wires are disconnected and connect them if necessary.
  • M
    Melissa BrownAug 13, 2025
    What to do if Mr. Heater Gas Heater main burner won't ignite?
    • P
      phicksAug 13, 2025
      If the main burner of your Mr. Heater Gas Heater does not ignite, it could be due to a blocked main burner orifice. Try cleaning the burner.
  • J
    Joseph MosesAug 19, 2025
    How to troubleshoot Mr. Heater Gas Heater when spark electrode does not produce spark?
    • M
      Michael RichardsAug 19, 2025
      If the spark electrode on your Mr. Heater Gas Heater isn't producing a spark, begin by checking the spark electrode itself; if it's defective, replace the ODS (Oxygen Depletion Sensor). Also, ensure the igniter wire is correctly attached to the spark electrode. Inspect the igniter wire for damage and replace it if necessary. Finally, check the piezo igniter; if it's defective, replace the control valve.

Summary

User Manual and Product Specifications

Safety Instructions

Installation, Operation and Maintenance Instructions

Guidelines for setting up, using, and maintaining the portable heater, including gas leak procedures.

Safety After Installation

Caution Notes

Important warnings regarding safe operation, handling, and placement of the appliance.

Product Identification

Diagram and list identifying key components of the portable heater.

Lighting and Operating Instructions

Step 1: Preparation

Inspect connections and ensure the control knob is in the OFF position before starting.

Step 2: Cylinder Installation

Connect the disposable propane cylinder to the heater and check for leaks.

Step 3: Pilot Ignition

Depress and turn the control knob to pilot, then ignite and hold for pilot light.

Step 4: Burner Operation

Light the burner tile and adjust heat output to desired setting.

Shut Down Instructions

Maintenance

Replacement Parts List

Troubleshooting Instructions

Specifications

Mr. Heater Portable Buddy MH9BX Specifications

General IconGeneral
Heating Capacity4, 000 - 9, 000 BTU/hr
Fuel TypePropane
IgnitionPiezo Ignition
Weight9 lbs
Safety FeaturesOxygen Depletion Sensor (ODS), Automatic Shut-off if tipped over
Heating AreaUp to 225 square feet
Connection1 lb cylinder or 20 lb cylinder with optional hose

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