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How to Protect Your Home — and Furnace! — from Freezing Temperatures

February 07, 2018 |

Grab your coat and bundle up...

Then go outside, walk around your house, and if you see a white PVC pipe that’s dripping water, you need to take action to prevent freezing!

frozen furnace drain line

We often get calls from customers saying their heat is broken, but when we got there, the problem is a frozen drain line!

If you have a 90% efficient furnace, it’s creating water right now (about a pint per hour)! When it freezes, water backs up to your furnace and will shut your furnace off.

Prevent your furnace from shutting off by:

  1. Locating your drain pipe somewhere around your house.
  2. Buying some Ice Melt/Rock Salt (found at local hardware stores) and put a handful of it in a mound underneath the drain line.
  3. Keep an eye on your drain pipe to make sure it doesn't freeze

This prevents the water from freezing back up to the water line, so your furnace can continue running to keep your home warm.

Step 1: Locate your drain pipe somewhere around your house

how to locate your furnace drain line

Step 2: Buy some Ice Melt/Rock Salt and put a mound of it beneath your drain pipe.

prevent drain line from freezing

Step 3: Keep an eye on your drain pipe to make sure it doesn't freeze

furnace drain line

Read more about how to safeguard your home's plumbing from freezing temps: Cold Weather Plumbing Tips