Furnace Repair

If your furnace goes out these repair articles will get it back heating.

How to Bleed a Hot Water Radiator and Clear a Steam Radiator Vent

If one radiator doesn't heat up but others do, try this one-minute fix first. It usually solves the problem.

Furnace Repair projects

  • 3 Easy Furnace Repairs

    Keep your high-efficiency gas furnace running with these 3 easy furnace repairs (Bonus: 2 repairs that you should never attempt on your own).

  • Furnace Humidifier not Working? Replace it

    If the humidifier on your furnace is not working, you can easily fix or replace it yourself. Simply follow our step-by-step photos and…

  • Do it right. Do it yourself.

    The Family Handyman is proud to announce the DIY University. Courses that give you the confidence and know-how to get the job done right.

  • Choosing Furnace Filters

    More expensive (electrostatic) furnace filters capture smaller particles and need less changing than cheaper (pleated) and the cheapest (woven…

  • How to Change a Furnace Filter

    Check your furnace filter monthly and change it when it's dirty. You'll get better heating in the winter and air conditioning in summer.…

  • The Best Furnace Filters to Buy

    A high-efficiency furnace filter can slow airflow too much, but low-efficiency filters don't filter dust very well. Get a better…

  • Fall Furnace Maintenance Guide

    Keep your furnace running efficiently and safely and prevent the hassle of breakdowns with a few simple maintenance procedures. We'll walk you…

  • Do It Yourself Furnace Maintenance Will Save A Repair Bill

    Winter’s tough enough without your furnace dying or not putting out enough heat. And when it comes to furnaces, an ounce of prevention…

  • Do I Need a New Furnace?

    Before you sit down with an HVAC contractor to talk about your furnace, read up on what our pros and field editors think you need to know.…

  • How to Adjust a Mechanical Thermostat

    HVAC units that cycle on and off quickly or erratically may just need minor thermostat adjustments. Check level first, then take a look at the…

  • Water Around Furnace Means Clogged Condensate Drain

    If you notice water around the furnace, the condensate drain may be clogged with slime. Fix the problem with chemical tablets and a larger drain…