Question about Master Heaters Master B115DT 115,000BTU Fan Forced Air Heater with Thermostat

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Master 115,000 will not stay running

If you take off the top cover, it will run o.k. for a while and then shut off and never come on again. unless i turn it back off and let it reset. have cleaned the air vane pump and blown hose clear, also cleaned the air filter, and changed the fuel.

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It sounds as if your are having a fuel delivery issue. Always start troubleshooting fuel delivery problems with a pump pressure test. Air pump pressure is extremely critical on these computerized heaters. Instructions are at www.reddyparts,.com

Posted on Dec 03, 2008

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2 Answers

115,000 btu reddy heater, 5 hrs used in sprayfoam-grinding environment. stopped working. when plugged in, only hums for a few seconds, then stops. how can i fix that?


First, remove the top cover. Inspect for a varmint nest. If clear, manually spin the fan. If it does not you either have a broken rotor that is binding or you have a bad bearing.

If it spins freely, apply power- see if the motor runs with the top cover removed.
If YES, replace the top cover. Its possible that the top is binding the fan.
If NO, the start capacitor is defective. The cap on R115 is internal and is not servicable.

Reading material about a hummer

Nov 04, 2011 | Reddy HEATER R115 115,000-BTU PORTABLE...

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My heater will rub for a minute or so then shut off ,,,unplug it and after a few seconds plug in back in and will run a little while again and help would be appreciated


Sorry, this is not a solution but some advice, Kerosene heaters can give off dangerous fumes if not working correctly, for your own safety you should contact the manufacturer.

Nov 10, 2010 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

My reddy heater 115 pro starts, but shuts off after about 5 seconds of running , i replaced the filters and nozzle about 2 years ago


Here is a service manual:

http://www.desaparts.com/service_manuals.html

If the flames actually starts but the unit shuts off after 5 seconds you need to check the pump cover on your heater to make sure you have no cracks in the rear cover.
This could be from low pump pressure but most often this problem is caused from a defective control board.

Oct 03, 2010 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

Reddy heater 165,000 runs for approx 15 to 20 min. I unplug wait 5 min. it restarts again and runs for another 15 to 20 min. and so on ....and so on purchased approx 1 year ago


There is a sensor in the tube that is a safety feture. it is a snap disc it maybe faulty, it is reading that the tube is to hot and shutting down, it cools and works again, check snap disc and also they need pleanty of fresh air.

Jan 13, 2010 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

Ready heater forced air runs few minutes then shuts off


Sounds like a full services like its getting too much air,and blowing out the flame. Check your fuel filter,and add a new spark plug ,also change the vanes on the pump, thus aFuu service. these sould be performed every fall before .

Dec 16, 2009 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

My reddy heater will run for a minute and then quit ?


Checkfor an air leak somewhere in the system. Just the slightest little bit will cause this kind of problem. Possibly a loose fitting air line, or a crack in the burner head- Doesnt take much of a leak. Best way is to use soapy water and just look fr the bubbles. Watch out for the fan blades!!!!!!!!

Jan 17, 2009 | Reddy HEATER R115 115,000-BTU PORTABLE...

1 Answer

B115DT


Check the photo cell and its connections. Make sure it is clean and seated properly also.

Jan 24, 2008 | Milwaukee Tool Master Heater B115 Series...

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