He has had nothing but problems with it trying to keep it running. Re: Garage Heater (Big Maxx) isn't working - NEED HELP!!! Mr Heater won't fire. Register. The Mr. Heater Big Maxx is one of the more popular models they sell. Step 1 Check to make sure that proper, sufficient gas is available to the heater. He has replaced 2 pressure sensors, the circuit board and I don't think it has ran for a month steady without quitting . Remember Me? Restart. For inquiries regarding, Mr. Heater, Sunrite, and BaseCamp products, please call: Phone 1-800-251-0001 (USA & Canada) or 216-916-3000 Fax 800-321-0552 or 216-916-3012 Shop Mr. Heater Big Maxx 4 Vertical Commercial/Residential Garage Heater Vent Kit in the Garage Heater Vent Kits department at Lowe's.com. Mr. Heater accessories are designed to work universally with all brands of propane appliances. This Garage Heater Ignition Control Circuit Board is the replacement board for the Enerco or Mr. Heater garage-style heaters. The board is designed for either the Propane or the Natural Gas units. These products allow connections to all types of high and low pressure appliances in the camping, grilling, R.V. Username. Buy Mr. Heater 4 Inch Horizontal Vent Kit for Big Maxx MHU45LP, MHU45NG, MHU75LP and MHU75NG Unit Heaters #F102845: Heaters & Accessories - Amazon.com … Password. Mr. Heater, Inc. Kerosene Forced Air Heater 4 Operating Instructions and Owner’s Manual RESTART AFTER SAFETY SHUTDOWN (MH50KR, MH75KTR, MH125KTR, MH175KTR & MH210KTR) See page 7 MH50KR - Unplug unit. If the heater ever needs repair, they are standing by to help, if your troubleshooting efforts do not work. Complete 4-in vertical single and B-vent ducting for unit heater. My mr heater big Maxx has two flashes on the led light and says that system is lockout failed to detect or sustain flame, pressure switch Is good,cleaned flame sensors and installed new control. Mr. Heater... | Posted on Oct 18, 2015 | Be the first to answer The majority of the building has a regular furnace & A/C unit. MH75KTR, MH125KTR, MH175KTR & MH210KTR - Toggle switch to “OFF” position, wait 5 minutes. The Ignition Control Board, part 60105, works on both the 45,000 BTU and the 75,000 BTU heaters. Designed for those cold winters, where work needs to get done, in places like : your garage, a company warehouse, barn or any other large space where warmth is essential, and appreciated, even if by an animal. Mr. Heater has assembled the industries most complete line of high quality propane hoses, fittings, regulators and accessories. Wait 5 minutes. Mr. Heater 4 Inch Horizontal Vent Kit for Big Maxx MHU45LP, MHU45NG, MHU75LP and MHU75NG Unit Heaters #F102845 F102845 vent kit Used for horixontal venting on MHU45 heaters Used for horixontal venting on MHU75 heaters Maintains proper clearances through combustible construction May require additional parts to meet local codes The Mr. Heater 4 Horizontal Vent Kit. The Mr. Heater Big Maxx series has been a top selling garage heater for years. Login with Facebook Log in. Just some info: My neighbor put in a Mr. Heater 75,000BTU in his garage 2 years ago next week. ... Big Maxx propane unit heater parts and info . Its only the tractor and workshop side the that relies on the ceiling hung Mr Heater. Upvote #8 12-03-16, 04:43 PM ... 5 flashes is "Flame sensed and gas valve not energized" (page 11) Code 2 is "system lockout - … and outdoor markets. Plug back in. The Mr Heater that failed is in the workshop, which is separated from the majority of the building by an insulated wall. 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