Does not start checked fuel at injector pipes fuel just dribles out should be
spittin gout at pressure but does not what do u think diesel injector pump packed up as these do have a comes problem.thanks
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Depends on if this is a 1 or 2 pipe system. If it is a 1 pipe system, the fuel pump may not have enough pressure & need to be replaced. A 2 pipe system should self prime, so if there is no return fuel line, you may need to consider installing one. Also check to make sure the fuel filter is clean.
Is there a fuel pressure gauge on it? IF so it be set to the pressure on the nameplate rating. Mine did samething and I had to replace the rubber hoses from the pump to the injector. Your fuel pressure will tell us whats going on.
Your air pressure may be too low. Don't know why they would adjust the air pressure but that's what it sounds like or may be they moved the injector flow slightly away from the spark which would caused a no fire situation as well. hope this helps you out.
Clean the injector located right beside the spark plug and check both rubber tubes that connect to the housing that the injector screws into and finally make sure you turn the plastic screw on the plate where the filter goes. This screw regulates the air pressure . One of the screws is for a pressure gauge and the other one adjusts the air pressure.
First, do not keep trying to light it. The igniter may be bad and kerosene will keep building up in the burner. Test the igniter with an ohmmeter. I don't know the exact value at this second but it should be less than 20 ohms. You can also use a clamp on ammeter around one of the leads. If the igniter is drawing current, it is good.
Does the fuel pump make a loud ticking or thumping sound. If it does, you have a fuel problem. This could be caused by the filter at your tank, a dirty fuel sump strainer, no fuel in the tank, or an air bubble in the fuel line.
You should also check the flame rod. It can be cleaned with some steelwool or fine sandpaper.
Check the circuit board by checking for 120vac at the 2 pins where the igniter connects while the heater is starting.
Also check the air line going to the air pressure switch for cracks and splits. If the air pressure switch isn't made, the fuel pump will not run.
Check the flue pipe for obstructions like bees nests from the summer.
I hope this helps, let me know if it doesn't. If you need parts I can also get them.
3 blinks indicates a pressure switch error. Check or replace air filter, condensate hoses for blockage, check small hose uo to pressure switch(s), check the vent pipes to make sure they pitch back to the furnace, check the air intake and exhaust pipes for any blockage outside. If all looks good, jump out pressure switch as soon as the exhaust fan starts to turn and see if unit starts. If it does, replace pressure switch.