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

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Bypass photocell on master kerosene heater?

Photo cell bad need to use the heater till i get a new part. can I bypass it,and if so how?

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Posted on Jan 02, 2017

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SOURCE: my kerosene master heater wont lite

Remove the burner nozzle, flush out the pump and nozzle line and then replace the burner nozzle.

Posted on Jan 14, 2011

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SOURCE: older master kerosene heater i

Here's a link. I think you'll find what you're looking for. Just look for the Model # of your heater.

Posted on Mar 03, 2011

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SOURCE: How do i get an owners manual for a Handy Master

I get about 90% of my manuals from the manufacturers web site. Give that a try. You may have to do a bit of research, I do not recognize the Handy Master brand, it may be a relabel from another manufacturer.
Good Luck

Posted on Dec 02, 2009

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1 Answer

How to bypass photocell

It would be very unwise to bypass or remove the photocell on your heater, it is there as a safety control, if the heater doesn't ignite or while running unattended runs out of fuel, it will stop. Without that safety net it will just keep going, and the result could be disastrous. It would be better to cure the problem caused by the photocell, and then return to use with it the way the heater was intended. What was the problem??

Mar 02, 2014 | Reddy Kerosene Heater with Thermostat:...

1 Answer

All pro 60,000 kerosene heater wont start, igniter lights then cuts off. i cleaned fuel filter and air filter. and burner .. i dont know how to check or clean the photo cell.. any help

If you can get to the photocell, make sure that it is clean. To test it you need an ohm meter. Hook the meter to it and set the meter to read Kohm.. See what it says, then shine a light on it and see if the meter reading changes. IT should drop. If it does not, or the reading is really high, replace the photocell.

Nov 25, 2013 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer

How do u bypass photo cell on r110 readyheater

The R110 is a heater using the older spark plug technology. In other words- no computer on board. This test will not work on heaters using the new Hot Surface technology.

Disclaimer- bypass the photocell for test purposes only. The photocell is there to prevent filling your shop with raw fuel in the event that there is a flameout.

To bypass connect a jumper wire between the 2 spades where the photocell normally connect.

Oct 24, 2011 | Heating & Cooling

1 Answer



That sounds like a bad photocell or a dirty photocell....check the photocell and clean it firt and then replace if neccesary...

Here are a couple of tips that I wrote that tell you how to troubleshoot a Torpedo or Reddy heater...

Reddy Heater - Troubleshooting Torpedo Heaters

Torpedo Heater Pump Pressure Adjustment


Jan 27, 2011 | Heating & Cooling

1 Answer

Kerosene heater cuts off after a few seconds

Photo celll rarely goes out, but time to remove the gum out!---or OVERHAUL TIME!

Dec 18, 2009 | Heating & Cooling

2 Answers

Torpedo heater runs for a minute or two then the breaker trips.

You can test the photocell by hooking up a ohm meter on thr rx1k scale. Photo cell should be out of the heater.Hold photocell up to a light bulb,with light on resistance of photocell should drop to 0 to 100 ohms.Holding finger over the photcell and blocking the light the resistance should go up to the maximum resistance

Jan 31, 2009 | All-Pro Kerosene Garage Shop Heaters - All...

1 Answer


It sounds like either the photocell or control board is defective and you aren't going to like the solution. There is not much way to troubleshoot the electronic components without DESA's HA1170 diagnostic tool. The new style heaters are akin to the new style cars- Put the new part on and see if it fixes the problem.

But, don't rule out that you have a slight air pump adjustment problem, which is causing the flame to be off-color, which will cause the photocell to shut the heater down. By quickly grounding the photocell terminals, you are merely tricking the system. Watch your knuckles!

Read these troubleshooting tips

Dec 10, 2008 | Reddy Heater-170,000 BTU Kerosene Deluxe

2 Answers

Reddy heater 110btu kerosene starts and shuts off?

I would say the thermostat is bad after reading your problem over several times. There is no reason to suspect a wiring problem, and I strongly suggest you don't bypass anything! A fire or explosion could result. Replace the thermostat as a probable cause.


Dec 08, 2008 | Reddy Heater-70,000 BTU Kerosene w/T'stat

1 Answer

Wont fire

No solution. The electronic control monitors the flame in the heater using a photocell. The ligth intensity and frequency are monitored to insure that the heater getting a good burn and therefore not emitting a high level of toxic gasses.

dirty photocell
bad fuel causing bad flame

Nov 17, 2008 | Reddy Heater-170,000 BTU Kerosene Deluxe

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