When Should Dallas Homeowners Replace a Furnace?
First cold morning, you bump the thermostat up and the house smells like burnt toast for ten minutes. Then comes a bang from the hall closet. Or nothing. Dallas can swing from shorts to frost warnings in a week, and a furnace that’s sat dark since April tends to pick that morning to quit. So now you’re stuck deciding whether to replace a furnace or write one more check for a repair.
Age, and What You’ve Already Spent
I start paying attention at fifteen years. Gas furnaces around here usually go 15 to 20, and the heat exchanger tends to settle it. If a tech finds a crack, that’s the end. It’s a carbon monoxide risk, and nobody should patch it.
One repair on an old furnace isn’t a verdict. I’ve seen a 17-year-old unit get a $180 igniter and run for years after. But a blower motor, then a control board, then a flame sensor, all inside three winters? That’s the furnace talking.
Here’s where I’d draw the line. When a single repair costs a third of a new unit, I’d replace a furnace instead of patching it.
When the Gas Bill Jumps
Heating season here is short, so a Dallas furnace runs a fraction of the hours one does up north. That’s why a jump in the bill sticks out. Same thermostat, same house, bigger number.
A furnace that’s losing efficiency burns more gas to hit the same temperature. Older ones often sit around 70 to 80 percent AFUE, and a dirty burner drags that lower. New high-efficiency models run 95 or better.
Before you spend a dime, change the filter. A clogged one and leaky ducts can fake a dying furnace, and the filter takes five minutes. If the bill stays high and the furnace is past fifteen, that’s when I’d start thinking about whether to replace a furnace.
What the Job Looks Like
If you do replace a furnace, a straight swap usually runs four to eight hours. Add time if the venting or ductwork needs changes, which isn’t rare in older Dallas homes with the unit up in a hot attic. Gas lines aren’t a YouTube project. A bad connection can hurt somebody.
Sizing is where furnace replacement goes right or wrong, and bigger isn’t better. An oversized unit short cycles and wears out early. The back bedroom stays cold anyway. Ask whoever’s quoting for a load calculation, not a copy of the old unit’s size. Ask about permits up front, too, since they vary by city.
Why October Beats February
Winter Storm Uri in February 2021 showed North Texas what a booked-solid service calendar looks like. Even a normal cold snap fills ours in a day or two. Right now you can replace a furnace on your own schedule, compare quotes, and decide in a warm living room instead of a 40-degree one.
Now the honest part. If yours is eight years old and running fine, don’t buy a new one because the leaves are turning. A tune-up is the better spend. I’d rather tell you that than sell you something you don’t need.
Get It Looked At
If you can’t tell where yours stands, call Total Air and Heat in Plano. We’ll inspect it and tell you straight whether to replace a furnace or leave it alone. Wait for the no-heat call and you’re paying emergency rates for whatever unit’s on the truck. We’re Not Comfortable Until You Are, and that includes 2 a.m.
FAQ
How long does a furnace last in texas
Usually 15 to 20 years with yearly maintenance. Texas furnaces run fewer hours than northern ones, but hot attics and long idle summers wear on parts. Past 15, expect repairs to pick up.
Can I keep my old ac if i get a new furnace
Often, if the AC is fairly new and the coil matches. A mismatched one costs you efficiency. If the AC is 12-plus years old, it’s usually cheaper to replace a furnace and AC together than make two visits.
My furnace smells like burning the first time i turn it on, is that bad
A dusty burnt smell for ten or fifteen minutes is normal after months off. Rotten eggs means gas, so get out and call the gas company. Burning plastic or smoke that lingers means shut it off and call us.
Do I need a permit for a new furnace in plano
Probably, but I won’t guess at the city’s current rules. Call Plano’s building inspections office, or ask your installer who’s pulling the permit. A contractor who says skip it is telling you something about the contractor.
Is it worth fixing a 20 year old furnace
Rarely. It’s past typical life, and parts for older models get hard to find. A cheap igniter swap might buy one more season, but a repair over a third of a new unit’s price should go toward the new one.
Furnaces usually give you a warning first. Most of us hear it as background noise until January.
