Having problems with york furnace. Blower kicks on but no flam . Fault light blinks 4 times cheat sheet says High Aux/spill limit switch open?

Those are safety switches that indicted you have a heater fault. One is high limit and the other indicates you are not getting combustion and gas is present, spilling back out. Possible venting issue or dirty gas tubes. Best to have an HVAC person look at it.

There is a reset button but that could cause a safety issue if the furnace actually has a fault. http://www.justanswer.com/hvac/61ds4...-high-aux.html