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Troubleshooting

The chart assumes that the proper gas and pressure is available to the heater. The chart also assumes that the heater is used in accordance with Mr. Heater installation and operating instructions.
Problem Observed Possible Cause Solution
Unit will not light Igniter sparking no flame. Supply tank valve off. Turn valve on slowly.
    Air in new tank. Allow several minutes to purge air with pilot valve depressed.
Pilot lights but goes out when safety control valve is released No flame or flame goes out. Regulator going bad. Replace.
    Thermocouple not located correctly in burner or connection to safety valve loose. Align or finger tighten connection than 1/4 turn more.
    Thermocouple defective. Replace.
    Safety control valve bad. Replace.
    Pilot too short or very yellow. Clean pilot orifice and tube.
Burner goes out All flame missing. Regulator going bad. Replace.
    Dirt or bugs in venturi. Clean with low pressure air and pipe cleaner.
Disagreeable odor Eyes burning or watering. Painting or cleaning products in use give off hydrocarbon vapors that cause aldehydes when contacting heated surfaces. They give off very disagreeable odors. Should not be used in areas with flammable chemicals in use, paint, lacquer or parts cleaners.
Flame appears mostly yellow on MH80CV   The MH80CV operates with more yellow in the flame than the MH200CV Unit is working properly.
IF SERVICE IS REQUIRED
For information regarding service, please call our Toll-Free Number: 1-800-251-0001. Our office hours are 8:30 a.m. - 5:00 p.m., Eastern Time Zone, Monday through Friday. Please include the model number, date of purchase, and description of problem in all communication.
WARRANTY
Mr. Heater warrants Mr. Heaters and accessories to be free from defects in material and Workmanship for a period of 1 year from date of purchase. Mr. Heater will repair or replace this Product free of charge if it has been proven to be defective within the 1 year period, and is Returned at customer expense with proof of purchase to Mr. Heater within the warranty period.
IF SERVICE IS REQUIRED
For information regarding service, please call our Toll-Free Number: 1-800-251-0001. Our office hours are 8:30 a.m. - 5:00 p.m., Eastern Time Zone, Monday through Friday. Please include the model number, date of purchase, and description of problem in all communication.


TROUBLESHOOTING
Original Series Tank-Top Heaters
Big Buddy
Big Max
Portable Buddy
Convection Heaters
Forced Air Kerosene Heaters
Forced Air Propane Heaters
Garage / Shop Heaters
Patio Heaters
Radiant Portable Heater (Model MH35LP)
Radiant Portable Heater (Model MH125LP)
Tube Heaters