Happy New Year! As we welcome 2026, let's focus on the invisible engine of your home: your heating system. It's been working overtime through December, and January is when most systems start showing signs of strain.

The "Post-Holiday Hangover" for Your Furnace

December is brutal on heating systems. Between hosting guests, keeping the thermostat higher than usual, and the coldest nights of the year, your furnace has been running at near-maximum capacity for weeks. By January, components are stressed, filters are clogged, and small issues that went unnoticed during the holiday rush can suddenly become urgent problems. Don't let the "January Freeze" catch you off guard — a furnace breakdown during a cold snap isn't just inconvenient, it can cause frozen pipes and thousands of dollars in water damage.

3 Resolutions for a Warm 2026

• Change Your Filters Every 1-3 Months: This is the single most important thing you can do for your heating system. A clogged filter restricts airflow, forcing your furnace to work harder and consume more energy. It also circulates dust, allergens, and pet dander throughout your home. Standard 1-inch filters should be replaced monthly during heavy use; high-efficiency pleated filters can last 2-3 months. Check your filter now — if you can't see light through it when held up, it's overdue for a change.
• Listen to Your Furnace — Strange Sounds Mean Something: Your heating system shouldn't bang, rattle, screech, or click repeatedly. Banging often indicates delayed ignition (gas builds up before igniting — potentially dangerous). Screeching typically means a worn blower belt or motor bearings. Clicking that doesn't lead to ignition suggests a failing igniter or flame sensor. Rattling could be loose duct connections or a cracked heat exchanger — which is a carbon monoxide risk. If you hear any unusual noises, don't ignore them.
• Book Annual Professional Maintenance: Just like your car needs an oil change, your furnace needs an annual tune-up. A professional inspection includes cleaning the burners, checking the heat exchanger for cracks, testing safety controls, lubricating moving parts, and verifying gas pressure. Annual maintenance catches problems early, improves efficiency by 10-15%, and can extend the life of your system by several years. Most importantly, it ensures your furnace is operating safely.

The Silent Danger: Carbon Monoxide

A cracked heat exchanger or blocked flue can leak odourless, colourless carbon monoxide (CO) into your home. Every home with a gas furnace should have CO detectors on every level, especially near bedrooms. Symptoms of CO exposure include headaches, dizziness, nausea, and confusion — if you suspect a leak, open windows immediately, leave the house, and call 911. A professional heating inspection specifically checks for CO risks.

Repair or Replace? A Quick Guide

If your furnace is over 15 years old, requires frequent repairs, or your heating bills have been creeping up despite no change in usage, it may be more cost-effective to replace it. Modern high-efficiency furnaces operate at 95-98% AFUE (Annual Fuel Utilization Efficiency) compared to 60-80% for older models — meaning up to 35% less natural gas to heat the same space. The upfront investment typically pays for itself within 4-6 years through lower energy bills, and many utility companies offer rebates for upgrading to high-efficiency equipment.

At DOSANJH Plumbing & Heating, heating is in our name for a reason. Our licensed gas fitters have been keeping Lower Mainland homes warm for over 20 years. Whether you need a quick repair, annual maintenance, or a full system replacement, we provide honest assessments and permanent solutions — no upselling, no unnecessary replacements.