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Before troubleshooting, find the heater’s model number, fuel type, and product family. A portable Buddy heater, vent-free wall heater, convection heater, forced-air propane heater, and garage/shop heater can have different ignition systems, troubleshooting steps, and safety requirements. Use the matching Buddy, vent-free, convection, forced-air, or garage/shop resources and owner’s manual.
If you smell gas or see abnormal flame behavior, stop using the heater and follow its warnings. Don’t improvise a repair or continue trying to light it.
Start with the exact model and its manual
Locate the model number on the heater’s rating label and confirm the fuel type. Then open the manual for that model and follow its lighting, maintenance, and shutdown instructions. Mr. Heater provides separate troubleshooting resources for different product families; a step or diagnosis for one family should not be assumed to apply to another.
Limit owner troubleshooting to checks the manual permits. Component replacement, gas-pressure or regulator problems, and faults that persist after the listed basic checks call for Mr. Heater’s product resources or qualified service.
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#1 Best Overall
- Emits 4,000 or 9,000 BTU/hr radiant heat
- Designed and approved for indoor and outdoor use
- Heats up to approximately 225 square feet
- Features emergency low oxygen safety system
- 2 temperature settings: low and high
The heater does not spark
A heater that produces no spark has a different problem from one that sparks but does not ignite. Depending on the model, possible causes listed in the manual include the electrode, its wire or grounding, or the igniter. Battery-powered ignition and piezo or other ignition systems are not interchangeable, so use the model’s own checks rather than applying a generic repair.
- Follow the manual’s instructions for the heater’s ignition type and any owner-serviceable checks.
- If the manual identifies an electrode, wiring, grounding, or igniter fault, or the permitted checks do not restore spark, stop and contact manufacturer support or a qualified technician.
For a Buddy heater, consult the Portable Buddy Radiant Heater Operating Instructions and Owner’s Manual if that is the exact model family.
Rank #2
- 4,000 or 9,000 BTU radiant heat for customizable comfort
- Designed and approved for indoor and outdoor use. Indoor use not approved in Canada or Massachusetts.
- Heats spaces up to 225 sq. ft. with efficient radiant warmth
- Up to 5.4 hours of runtime on a 1 lb. propane tank
- Up to 108 hours of runtime when connected to a 20 lb. propane cylinder with an optional Buddy hose and fuel filter
The heater sparks, but the pilot does not light
A visible spark means the immediate symptom differs from a no-spark fault. Check that fuel is available and follow the exact lighting procedure in the manual. A blocked pilot is one possible cause identified in manufacturer troubleshooting material, but the appropriate inspection or cleaning method depends on the heater.
Do not disassemble or clear a pilot unless the manual specifically describes an owner-permitted maintenance step. If the prescribed lighting steps and basic checks do not work, use the family’s manufacturer support resources: Buddy, vent-free, or convection.
Rank #3
- Heats up to 450 square feet
- Low, Medium, and High heat settings: 4,000 / 9,000 / 18,000 BTU
- Heats up to 216 hrs. on two 20lb Propane tanks with optional hose (low setting)
- Big Buddy dual heating system combines radiant heat comfort with convection heat air flow
- Built-in high powered fan
The pilot lights but will not stay lit
Manufacturer troubleshooting material lists pilot cleanliness or assembly issues among possible causes. Manuals may also point to the pilot’s relationship to the thermocouple or other model-specific component faults. A lit pilot that goes out does not establish which cause applies.
Use only the manual’s stated cleaning and inspection steps. Avoid generic instructions to bend, reposition, adjust, or replace parts: those actions may be inappropriate for the model. If the pilot still goes out after permitted checks, have the heater assessed by manufacturer support or qualified service.
Rank #4
- 3,800 BTU per hour
- For use with propane gas
- Heats up to 95 sq ft
- One button ignition on function
- 8in round stand; uses little floor space
The pilot stays lit, but the burner does not produce heat
A working pilot does not prove that the main burner is clear or receiving fuel correctly. A blocked burner orifice or low gas pressure may be involved. On some garage/shop heaters, thermostat wiring or connections are also possible causes.
Consult the heater’s manual for the checks that apply to its design. Do not attempt to correct gas pressure, service a regulator, or replace a valve or other gas component based on a general troubleshooting article. For garage/shop models, see the manufacturer’s Garage/Shop troubleshooting information.
Best Value
- Emits 4,000, 9,000 or 18,000 BTU/hr radiant heat
- Designed and approved for indoor and outdoor use
- Heats up to approximately 450 square feet
- 3 temperature settings: low, medium, and high
- The use of un-authorized accessories/attachments with this heater are expressly prohibited, may cause serious injury, and will void the warranty.
The heater shuts off during normal operation
Repeated shutdowns can have different explanations across models. Manufacturer manuals identify possible causes that include pilot blockage, regulator faults, internal contamination, and—on applicable units—tip-over switch activation or a need for fresh air. Which checks and remedies are safe depends on the model.
Follow the manual’s shutdown troubleshooting steps and ventilation instructions exactly. Do not transfer a ventilation opening size or other requirement from one manual to a different heater. If shutdowns continue after the manual’s permitted checks, stop using the heater and contact manufacturer support or qualified service.
Use forced-air propane heaters only as directed
Mr. Heater describes its forced-air propane heaters as outdoor-only; garage or construction use is addressed only with proper ventilation. The manufacturer also states that this product family lacks an oxygen depletion sensor (ODS). Those warnings apply to the forced-air propane family, not automatically to every Mr. Heater product. Check the specific unit’s manufacturer instructions and manuals before use.
When a replacement part may be appropriate
A pilot problem does not by itself establish that a replacement pilot assembly is needed. Mr. Heater lists a vent-free LP pilot assembly/ODS, but that listing is for a particular product category, not a universal fit. Confirm the exact model and fuel compatibility with the parts information or manufacturer support before ordering or installing any part.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
