Furnace starts proper operation fires 10 seconds later goes out checked pressure switch replaced pressure switch still have problem I noticed a drip comind from the bottom of the motor and I also had a bad rainstorm is it possible the pvc exhaust is full of water

Quote( I also had a bad rainstorm is it possible the pvc exhaust is full of water)
Not likely,at least not from the rainstorm,

Are you getting a code on your circuit board(blinking light)

Do the popular thing and clean the flame sensor. Everybody's doing it these days, it's trendy but fashionable.

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Originally Posted by jcapone2524

furnace starts proper operation fires 10 seconds later goes out checked pressure switch replaced pressure switch still have problem i noticed a drip comind from the bottom of the motor and i also had a bad rainstorm is it possible the pvc exhaust is full of water

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WE have pictures.

It flashes 3 times meaning pressure switch stuck open I changed switch and still had the same problem

Clean sensor?

You mentioned water... if the condensate trap is clogged, a flooded secondary heat exchanger could result in problems keeping the pressure switch engaged.

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Originally Posted by hvac1000

WE have pictures.

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Admit it. You get a nickel for every time you post that pic don't you? :p

Sure but it is a dime