Heat is the one system nobody misses until it's gone. The AC gets all the attention in a DFW summer, but the first cold morning of the year always arrives before anyone feels ready, and a house with no heat in a hard freeze is both a miserable tenant call and a legal clock you don't want running. The fix is boring and cheap: handle five small things now, while it's still hot.
This is educational information, not legal advice. For a specific situation, talk to a licensed Texas real estate attorney.
Why August Beats October for Heating Prep
DFW's first real freeze usually lands in mid to late November, and the season's first cold morning always catches somebody off guard. The problem isn't only the cold. It's the queue.
Good HVAC companies book out fast once temperatures drop. A tune-up you could schedule this week for next Tuesday turns into a ten-day wait in November, when every heater in the metroplex is getting its first hard run of the year. Handle it while the crews are slow and you control the timing instead of standing in line behind every other owner whose furnace just quit.
1. Book the Furnace Tune-Up
A fall heating tune-up runs about $120 for a single system, and it pays for itself the first winter it prevents a 9 p.m. no-heat call. A good tech checks the burners, tests the ignition, measures airflow, and inspects the heat exchanger for cracks.
That last one matters most. A cracked heat exchanger can leak carbon monoxide into the house, and it's the kind of failure you want found on a service ticket in August, not by a tenant in December. If your rental runs a heat pump instead of a gas furnace, the same visit covers the reversing valve and the auxiliary heat strips that carry the load on the coldest mornings.
2. Change the Filter and Confirm the Thermostat Works
A clogged filter is the cheapest problem you'll ever fix and the one tenants forget. A standard one-inch filter costs about $18 and should go in before the system switches from cooling to heating.
While you're there, cycle the thermostat into heat mode and confirm it fires. A thermostat that lost its program over the summer, or a dead backup battery, is a five-minute fix in August and a service call in a cold snap. If the unit has a smart thermostat, check that it's still connected and that you or your manager can see it.
3. Test Every Smoke and Carbon Monoxide Alarm
Heating season is when carbon monoxide risk climbs, because gas furnaces and gas water heaters run harder. Texas Property Code Chapter 92, Subchapter F, requires working smoke alarms in a residential rental and puts the duty to install and maintain them on the owner.
Carbon monoxide alarms aren't mandated statewide for every older house, but on any rental with gas appliances or an attached garage, they're cheap insurance and the right call. Test each alarm, replace batteries, and note any unit older than the manufacturer's stated lifespan. Write down the date you tested them. A dated record protects you if a dispute ever comes up.
4. Know Your Repair Clock Before the Cold Hits
When a heater fails in a Texas winter, the clock is not casual. Texas Property Code Section 92.052 requires a landlord to repair a condition that materially affects the physical health or safety of an ordinary tenant, and a house with no heat in a hard freeze can qualify.
The statute expects action within a reasonable time after proper written notice, and "reasonable" shrinks fast when temperatures are dangerous, especially with a vulnerable tenant in the home. The same repair duty that governs a dead AC in July covers a dead furnace in December; our guide on summer HVAC failures walks through Section 92.052 in detail.
This is where preparation and law meet. If you've already had the system serviced, a winter failure is a fast repair by a tech who knows the unit. If you haven't, you're diagnosing a cold house under a legal deadline. Heating disputes get fact-specific, so for any repair or habitability question, talk to a licensed Texas real estate attorney about your specific situation.
5. Tell Your Tenant What's Theirs and What's Yours
Most winter heating calls start with something the tenant could have handled. Set expectations in writing before it's cold. Tell them the filter is theirs to change monthly and hand them the size. Remind them to keep vents clear and the thermostat sensible, because a heater strains when someone runs it at 78 with a black filter.
Then make the other half just as clear. A real failure, a burning smell, a pilot that won't light, or any suspected gas or carbon monoxide issue is your problem, and you want that call right away, not after a week of a space heater. A tenant who knows the line calls you at the right time, and that alone keeps small problems from becoming frozen-pipe problems.
When should I service the furnace in a DFW rental?
Book it in late summer or early fall, before the first freeze in November. Crews are slower, prices are calmer, and you control the schedule instead of waiting behind every other owner once the cold arrives.
How long does a Texas landlord have to fix a broken heater?
Texas Property Code Section 92.052 requires a landlord to repair conditions that materially affect health or safety within a reasonable time after proper written notice. No heat in a hard freeze can qualify, and "reasonable" is short when temperatures are dangerous. Confirm your specific duty with a Texas real estate attorney.
Are carbon monoxide detectors required in Texas rentals?
Working smoke alarms are required under Texas Property Code Chapter 92, Subchapter F. Carbon monoxide alarms aren't mandated statewide for every existing home, but on a rental with gas appliances or an attached garage they're well worth the small cost.
Whose job is the furnace filter, the owner's or the tenant's?
The lease decides, but the DFW norm puts routine filter changes on the tenant and the mechanical repairs on the owner. Spell it out in writing and give the tenant the filter size so there's no excuse.
Want Us to Handle This?
Let Us Run Your Fall Maintenance
Scheduling the tune-up, tracking filters and alarms, and answering the 9 p.m. no-heat call is exactly what a property manager handles so you don't have to. If you'd rather not think about heat exchangers this fall, we've got it.
Call (817) 332-7368 Owner ServicesBottom Line
The first cold snap in DFW always arrives before anyone feels ready, and heat is the system tenants notice the second it fails. Book the tune-up now, change the filter, test the alarms, know your repair clock, and put the tenant's job in writing. Five tasks in August buy you a winter you don't have to think about.