What does the lockout timer do on a 20-year-old Payne home gas-fired
The technician came to see why the heat kept shutting off the pilot flame
and he took the "lockout timer" with him after testing. This black plastic
box had wires attached to it which he wired to the furnace with jumpers.
Before, the pilot flame would light, then the burners, and then after a
bunch of clicks, the whole flame would die out before the fan blower kicked
in. Now, with the lockout timer removed and its wires taped up with
jumpers, the pilot lights, then the burners light, and then after a few
minutes, the blower kicks in forcing heat throughout the house.
As he cheerfully left the house, with the heater finally working, he said
he'd be back with a new lockout timer in a few days.
My question is: If the lockout timer isn't needed, what does it do?
Also, he drilled some holes in the before and after ducts and inserted a
meter which showed 0.39 inches of water of pressure. He said it should be
much larger than that and that I needed a whole new system. Any information
on what the pressure means? (He didnt' even tape up the holes.)