Call back was out Friday to replace pressure switches worked for a little while and then stopped working ran emergency call on Saturday checked system found inducer coming on but found pressure switch for flue not reading what it was supposed to found only reading -.20 supposed to be -.75 are higher, took flue off and started system back up found it to have good pressure on pressure switch and furnace fired up put flue back together started tracing flue why inducer was running could hear the flue pipe was full of water, cut the pipe and put a furnco fitting on temporary to allow fall on the flue it is running up hill very bad I got good fall right now but flue need to be cut out and rerun to give fall back to furnace not away from it, spoke to customer about club membership he is a veteran from the marine corps, he signed up for basic veteran club memebership, I have quoted repairs to flue also