Morris-Jenkins technician next to furnace

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

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 outside house

We often get calls from customers saying their heat is broken, but when we got there, the problem is a frozen drain line! With preventative measures we can help avoid problems like this with our Priority Advantage® Membership

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

Where is my drain line information

Where is my drain line? Check for PVC pipe on the outside of your home!

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

Morris-Jenkins technician placing a salt mound below a drain line outside a customer's house to prevent ice

Rock salt helps prevent freezing, so putting a mound of it beneath your drain pipe can help keep your pipes during the colder months.

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

Close up of drain line with text: "Drain Line: check on it every hour. If you see ice starting to form on drain line, clear it away."

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