YORK FURNACE (FC35B3XN1A) 3 Blinking lights

Old 02-04-19, 05:27 PM
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YORK FURNACE (FC35B3XN1A) 3 Blinking lights

I have a York Furnace that has 3 blinking lights. Itís been -40 the last week. Issues started when cold started. Woke up no heat called contractor. He came & has written on receipt. 3 flush, Pressure switch open. Hose on inducer was pulled out, cut end for tight got & reconnected. Venter squeaks look at replacing ($100) Heat worked for a bit & eventually stopped working. Called them over again & stated no heat. Reduced price for labor to $40 since I stated problem wasnít fixed. They replaced Venter for $294 part & labor said old one locked up. Heat was working but wasnít blowing much air. I have 3 blinking lights (pressure switch open) not sure where to start. Contractor was called again states if any work done that itís covered by warranty if not theyíll charge for coming + parts. Any trouble shooting? Thanks in advance for any advice.
Old 02-04-19, 06:08 PM
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Welcome to the forums.

The pressure switch is directly related to the draft inducer. Have him check the vacuum. He may just insist on replacing the pressure switch. They rarely go bad. There may be a problem with the exhaust/flue.

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