ASSUMING your heater uses an eye (photocell) as a flame detector, the eye has high resistance when it's dark (no flame). When the flame lights, the resistance of the photocell drops dramatically and "signals" the safety shutdown unit that the flame is lit and all's well, so the safety control allows the heater to keep operating.
If the "eye" is dirty or has failed and doesn't signal the safety unit that the flame has lit, the safety unit "times out" after 30 or 40 seconds and shuts the heater down for safety's sake.
Of course, the "eye" MAY be good and the safety shutdown MAY have failed.
ANYHOW you'll want to repair the safety circuit, or someday the heater will fail to light and (with your wires "jumped"), continue to run and pump all the fuel in the tank into itself and eventually onto the floor (or WORSE)!
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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