Furnace won't go on. Light blinks three times. Code says that pressure switch stuck open. If I remove the hose from the switch it will sometimes ignite after the hose is put back on
Tools & Hardware - Others - York - Furnace Draft Inducer Blower Fasco # A224
Answers & Comments
Hi,
The pressure switch is not working or there is a bit of water in one of the hoses.
What is happening is that the pressure switch will not close when the inducer fan satrts up. This gives the stuck open reading....
Check all of the hoses and the vent piping for water inside and if that all checks out then replace the pressure switch...these do go bad way to often, but they are a saftey device so they make to to be very sensitive...
Here is a tip that wrote about how to buy heating and air conditioning parts online.
How to find Air Conditioning, Heating and Furnace parts online.
heatman101
Yeah,
I have had pressure switches fail in less then a year....the only other possibility that I have had happen is a cracked heat exchanger and you really want to hope that it is not that....
If you really need heat in the meantime. you can jumper the switch once the inducer is started and the furnace will come on, but you need to remove the jumper each time before it will restart...
heatman101