Archive for category: Uncategorized

In Wisconsin, fall is not a suggestion — it is a deadline. One week you are running the air conditioner, and a couple of weeks later the first cold snap rolls off Lake Michigan and every furnace in the Milwaukee area switches on at once. A fall tune-up is how you make sure yours is ready before that morning, instead of finding out at 6 a.m. that it is not. Here is what a tune-up actually involves, in plain language, from Guardian Heating & Cooling in West Allis.

Why Fall, and Why Before the First Cold Snap

Your furnace sits idle all summer. Dust settles, connections work loose, and small problems from last winter are still exactly where you left them. The first hard run of the season is the most demanding one your system will make — which is why so many furnaces fail in the first cold week, not the coldest one. A fall visit catches weak parts while they are still cheap and quick to replace, clears the dust that makes a system run hot and inefficient, and confirms the furnace starts, runs, and shuts down safely. It also beats the rush: once the first snap hits, every HVAC company’s phone rings at the same time. Scheduling in early fall means you pick the appointment, not the emergency.

What Gets Checked on a Tune-Up

• The heat exchanger, inspected for cracks and corrosion
• Burners and ignition — cleaned and tested for reliable starts
• The blower motor and wheel, cleaned and checked
• Electrical connections, controls, and safety switches
• The flue and venting, checked for blockages and proper draft
• The condensate drain on high-efficiency furnaces, flushed and tested
• The thermostat, confirmed against the actual temperature
• The filter, replaced or flagged if it is due
• A test run through a full heating cycle, start to finish

You can see the full range of what we service on our furnace and heating page.

Filters: The Small Job That Matters Most

If you do one thing yourself, do this. A clogged filter strangles airflow, makes the furnace work harder and run hotter, shortens its life, and can trip safety limits that shut the whole system down. Check your filter monthly during heating season. Most 1-inch filters need replacing every one to three months — sooner with pets, smokers, or recent remodeling dust — while thicker media filters last longer. Note the size printed on the frame before you buy, match the arrow on the new filter to the direction of airflow, and write the change date on the edge. It is a five-minute job that prevents a surprising share of no-heat calls.

A Word About Carbon Monoxide

Any fuel-burning furnace can produce carbon monoxide if it is not burning and venting properly, and you cannot see it or smell it. That is the serious reason a tune-up includes the heat exchanger and the venting — and why every home with a furnace should have working carbon monoxide detectors on each level and near bedrooms, with fresh batteries, replaced on the manufacturer’s schedule. If a detector alarms, get everyone out of the house and call emergency services first, then call us. Do not open windows and wait to see if it stops.

Signs to Call Before the Cold Snap, Not During It

• The furnace starts and stops repeatedly, or blows cool air
• New noises — banging, squealing, rattling, or a blower that hums but will not spin
• Uneven heating that is getting worse from room to room
• A musty or burning smell that does not clear after the first day of use
• Energy bills creeping up with no change in your habits
• A thermostat that no longer seems to match how the house feels

Homeowners in our newer service areas can read what we look for locally — see our pages for heating and cooling in Mequon and heating and cooling in Brookfield. Wherever you are in the Milwaukee area, Guardian Heating & Cooling is open 24 hours a day, 7 days a week. To book your fall tune-up, call (262) 573-8883 or reach us through our Contact page — before the first cold morning does the scheduling for you.