Hi i have a new imperial fryer and im tring to light it and cant seem to get it to work. any idea on how to get it working?

Check out the over heat is not shutting down to soon or thermostat is not opening ,

It sounds like your gas line either is clogged or your heating tubes are clogged up with oil/dirt/gunk? You can blow these out with a small hand held compressor or if you have a small enough brush, you can use that to clean it. The compressor is the quickest way, but have you cleaned this unit at all? Using a fryer boil out and running the fryer will also help clean out your holes, but again, the compressor works best.

Check the hi limit sensing bulb, it should not touch the fire tube.

Flame is Orange? If so, propane is "choked", not enough air. Remove burners, clean each burner hole with a same size metal dowel (coat hanger works well) flush out inside of burner with garden hose, hi pressure air through all holes to dry. Replace burners ONLY after also cleaning chambers and chimney (garden hose and long brush). Do not forget to clean pilot light area too.
Most Imperials are pre-set air intake. Check gas pressure if able, 3" NG, 10" LPG. Good Luck

I have a used fryer, imperial, looks like the ifs 40 but can not find the model number on it. Do you have any idea how I can find the model number?

For sure if you got gas to the unit.The only thing to keep the pilot for working is hi limit,thermocouplen.One other thing is does this unit need power for it to work?

Try to clean the pilot orfice,ive seen even though the pilot stays lit it doesnt have enough millivolts to energize the gas valve.Did you check the wiring really good?

This problem could be caused by a few different things. You should check the condition of your pilot and the thermocouple, if the pilot is weak due to being dirty you will not generate the optimum Millivolts to run the fryer, you may need to dissassemble and clean the pilot. The thermocouple needs to be correctly placed in the pilot assembly, if it has dropped down to where it is not in the flame it will not work correctly. You may need a new thermopile as it may not be generating millivolts as needed. Gas pressure can cause this as well, if the pilot goes out then the main burners come on you should check the gas pressure. One more thing to check is the hi-limit thermostat, if this is cutting out early your pilot will go out. Imperial uses a self-resetting limit, after a few minutes your fryer will relight and work until if cuts out again. If your fryer pilot stay on with the thermostat off for long periods of time and does not go out immediately when the burners come on and the pilot is clean, you may need a hi limit. This is a lot of info, I hope it helps.

I had a simular problem. The gas company disassembled the pilot light and cleaned it. The fryer works perfect now.
Hope this helps!
Ken

If your pilot lights up but the main burner doesn't light up then you have a bad pilot sensor or gas valve