Pressure Switch Question

Old 01-29-14, 06:20 PM
Thread Starter
Join Date: Nov 2010
Location: USA
Posts: 107
Upvotes: 0
Received 0 Upvotes on 0 Posts
Pressure Switch Question

I have been having issues with my pressure switch opening up when the furnace is running. I suspect it is either windy conditions causing a back draft or ice in the intake. We have been having extremely cold weather with wind.

My pressure switch has 2 hoses, one goes to the inducer motor and the other goes to the fire box next to the intake pipe. What is the purpose of the second hose?

If I disconnect the hose going to the firebox could this help if it is the wind causing a backdraft?
Old 01-29-14, 06:26 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 66,004
Received 4,155 Upvotes on 3,731 Posts
The quick answer is no...... you can't run the furnace without both lines connected.

A make and model of your furnace would be needed for an accurate answer.
You'll find the model number on a tag on the side of the furnace near the burner area.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: