My 150000 reddy heater sometimes won't ignite unless I remove the cover. with cover off it will ignite and I can put the cover back on and it will continue to run & heat fine?

SOURCE: reddy heat/scheu kerosene space heater no ignition

Typical kero heater uses either a spark ignition or a hot surface. The hot surface igniter is very fragile. A small bump may break the elements. Flame is detected by a photocell, signal is sent to the lockout relay board. Change the igniter costs about 50 bucks.

Jerry Magee

• 232 Answers
• Posted on Dec 12, 2008

SOURCE: Reddy Heater runs but will not ignite with bonnet attached.

First, let me say that the general principal of fuel delivery ***to the spark plug*** depends on several things.

1. Proper air pressure at the nozzle (provided by the rotor/motor)
2. Proper “fuel pattern” at the nozzle (provided by the rotor/motor/nozzle)
3. Proper amount of ***air & fuel*** at the nozzle (provided by the rotor/motor/nozzle)
4. Proper ***air flow (cfm) through the combustion chamber (provided by the fan blade/motor)
5. Proper rpm’s of the motor, which affects all of the above.

• Next, if the fan is OK (correct & intact) look at the NOZZLE. DESA recommends annual replacement of the nozzle, which is a wear item. Naturally, annual usage varies, so, wear will depend on annual usage. A worn nozzle produces a cone shaped SPRAY rather than a cone shaped FOG. A spray drowns the spark, where a fog gets ignited, provided it contacts the spark. ALSO, the pattern from a worn nozzle can completely miss the spark (combustion??? Hardly!). When the top is lifted the change in airflow allows a false correction in the combustion chamber, allowing combustion, but when the top is replaced the flame is extinguished. A restricted nozzle or a restricted fuel filter will also distort the fuel pattern and create the same symptom. Also, like the fan blade, make sure that the correct nozzle is installed. Nozzles get swapped, too.

Michael Chipman

• 1 Answer
• Posted on Jan 16, 2009

SOURCE: RM115 Reddy Heater forced air heater problem

I had close to the same problem i drain the tank added new fuel still no diffrence so i removed the filter going to the tank pick up flushed out with brake clean it work fine for half a day . I knew then i was on the right track . I went to the local hardware store and bought a tune up kit that had the filter in it,I replaced the filter going to the tank pick up and it's been working fine even in cold weather. Fuel quality has a big part to play in it's abbility to burn in colder tempicures.

SOURCE: 150,000 BTU propane Reddy Heater shuts off after ignition

Is there a frost line on your LP tank, if so you may need to replace the tank with a larger tank or refill your tank. This can happen if the tank your using is too low or too small (use 100 lb tank or greater). If there is no frost line it may be an issue with the thermocouple. The manufacturer offers a service manual and owner's manuals on there site. This should assist you... www.desatech.com Thank you

SOURCE: heater will not stay on rm60 reddy heater

When you say the heater is coming on does it actually ignite or is the motor just running until the safety circuit kicks it off? The air pump on you heater should blow at 3.5 to 4 psi which runs up to the nozzle which is a venturi which sucks the fuel out of the tank. The motor will generally run for 20 to 30 seconds trying to ignite. If the flame sensor does not sufficient flame during the time it shuts the motor off. Check these items and let me know what you find.