I have a R 150 B that was working fine had been putting 5 gals of fuel at a time, took it to gas station and filled it up now it runs for maybe 30 sec then shuts off, tried cleaning filter, checked plug..any ideas?
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Re: R 150 B wont stay running
Most common problem is the CAD flame sensor, two wires in a round rubber boot about 2 inches long facing the combustion chamber. You can get one from Mr.heater for 3 bucks and even though the wires are a different color you can just splice the to your old wires and it will work fine, just did the same thing with mine and it's perfect now.
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Your talking about 1/8 cup of gas, per gallon of diesel. I think it should be fine but it will run hotter than usual. You will need to keep an eye on the flame and after it warms up. If the flame continues to pass by the cone then you will need to drain between 1 to 2 gallons out and store it (You will need to use your best judgement). Fill the heater back up with new diesel and use. when you run out, add 1 gallon of the tainted diesel to 2 gallons of new diesel and repeat. You will need to pay attention to the performance and make your own determination. Please remember that these units are to be used in well ventilated areas. They produce a lot of carbon monoxide. Good luck., .
try looking at the afc the fan control might need cleaning at the back of it could be filled with dust, or blocked air filter afc works on temp rise to start fan running and temp fall to stop running check settings on the afc thhey should be in your manual or afc might need changing
Make sure that the thermocouple is well into the flame. Check to make sure the other end is secure into the gas valve. Check for any poor connection both gas and electric. If the LP cylinder is icing up, it is a vaporizing problem and the heater is sucking the available gas out of the cylinder faster than it can vaporize. You will need a larger cylinder.
sounds like your thermacouplar is going out and needs replaced. Sometimes these will act like they are working fine , but when the pilot stays on for awhile and later goes out it is a sure sign that it is bad
You have some kind of fuel problem. When you mention 5 gals of fuel, that leads me to think you need more fuel ( more pressure). If you have a large tank and only have 5 gals you may no have enough head pressure to push the fuel through the line and all the filters in the system. That being said the Monitor 30 is the oldest vented heater around. Parts have not been available for 15 years. The thing that scares me about the M30 is the flame safety circuit. I don't think it is adequate. If you rely on this heater to keep pipes thawed I would get a new Monitor or Toyo.
There are any number possibilities for intermittent running. 1.Bad ground connection at the Ignition Device (transformer, spark box) 2.restricted fuel filter causing fuel starvation 3.crack in the plastic end cover 4.crack in the airline 5.crack in the fuel line 6.crack in the nozzle adapter 7.water in the fuel 8.Others I’m sure I left out You must be the one to troubleshoot & find the cause. Follow these troubleshooting tips
is the pressure regulator right for the type of gas your using...? i had the same problem.i found out that my regulator was for both lp and nat.gas.i also found out there is a small nylon pin underneath the brass cap on top of the regulator.i unscrewed the cap and the fitting was set for lp.and i was using nat. gas.i just pulled the nylon pin out,flipped it around and replaced the cap...works fine now.if your regulator is like mine the nylon pin is maked LP on one end and NAT. on the other.might be worth a try
make sure the high voltage lead to the sparkplug isn't touching anything metal on its way to the plug. the clicking may be the high voltage discharging to a metal part, not the plug. those wires age during use.