Miller kerosene furnace trouble

[swizzle]

Hi I own a miller D04490 model furnace. I've only used kerosene in it since I moved in. I've already changed the electrodes and the transformer and the reset box. The reset box is maybe 3 years old the other parts were changed last year. Periodically the furnace will just stop running. Normal I only have to open the door, pull the door switch out and hit the reset button and it fires right up. Lately its been doing it more and more and last night it did it twice. the only difference is that I have to flp the reset switch before pushing the button and I have to keep doing it several times before it finally kicks on. Can anyone tell me whats wrong with it or a good website for miller furnaces and parts at a reasonable price? Thanx Swizzle

[HayZee518]

A typical oil burner for fuel oil or kero uses a cadmium sulphide cell to detect the flame. it is located on the aperture plate just behind the spark electrodes. Once the pump is running and fuel is ejected from the nozzle, the spark is established and continues to spark throughout the burner operation. A flame is detected by the Cd cell and feeds a signal back to the burner relay and lockout circuitry. If a flame isn't detected within a certain time period, the lockout energizes and locks out the burner.
#1 clean or replace the Cd cell. 2. replace the felt filter in the fuel line. 3. Add a water scavenger to the fuel tank - kerosene and fuel oil floats on top of water. If there's water in your tank, bleed off about a gallon of fuel from your tank. the water should go with it and looks like "fat globules" in the fuel oil. The hi limit shuts down the burner if the trunk temperature gets too hot. The blower limit is adjustable and varies the on - off cyclic rate of your blower. The fan control can be automatic or manual - you just pull out on the white knob for manual. and the fan runs all the time. the door switch is a safety device for the burner and pump. The pump is a gear pump and is connected on the same motor shaft as the blower.

[swizzle]

Thanx HayZee518 that should keep me busy for a few minutes tomorrow. It's greatly appreciated. Swizzle