Heating Repair in McAllen, TX
Furnace, heat pump, and electric heat repair for the handful of Valley nights that genuinely get cold.
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Heating Repair in the Rio Grande Valley
Heating is a small part of the year in the Rio Grande Valley, but the nights that call for it tend to arrive suddenly. A hard freeze can put the Valley into the twenties, and when it does, every heating system in the region gets asked to work at once after eight or nine months of sitting still.
That pattern produces a specific kind of failure. Igniters that cracked during the summer, flame sensors coated in residue, heat strips with failed sequencers, and thermostats that were never switched over: these do not announce themselves in October, they announce themselves at 11pm in January.
A&A HVAC LLC repairs gas furnaces, electric furnaces and heat strips, and heat pumps, and we answer the phone at any hour. We also strongly recommend testing your heat once in the fall, before you need it, so that a repair happens on a Tuesday afternoon instead of during a freeze warning.
Symptoms to look for
- The system blows air that is not warm
- Nothing happens at all when you switch the thermostat to heat
- The furnace lights and then shuts off after a minute or two
- You smell gas near the furnace
- A burning smell that does not fade after the first 20 minutes of the season
- Clicking or rumbling from the furnace
- The heat runs constantly and still does not warm the house
- Your carbon monoxide detector has alarmed
Common problems we find
Failed igniter or flame sensor
On a gas furnace these are the two most common failures. A hot surface igniter is fragile and fails without warning. A flame sensor coated in oxidation makes the furnace light and then shut down within seconds because it cannot confirm a flame is present.
Tripped high limit switch
Almost always caused by a clogged filter. Restricted airflow lets the heat exchanger get too hot and the safety cuts it off. The switch is doing its job, but the filter is the real problem.
Failed heat strip or sequencer
Electric heat is common in Valley homes. Sequencers stage the heat strips on and off, and a failed one either leaves you with no heat or with strips that will not turn off.
Heat pump reversing valve or defrost fault
A heat pump that will not switch to heating mode, or that gets stuck in defrost, blows cool air while running. This is a control or valve problem, not a refrigerant problem in most cases.
Cracked heat exchanger
The serious one. A cracked heat exchanger can put combustion byproducts including carbon monoxide into your air stream. If we find one, the furnace is shut down until it is repaired or replaced, without exception.
Thermostat configuration
More common than people expect, especially with smart thermostats installed without the heating side wired or configured correctly. Worth checking before anything else.
Ready to get this fixed?
Call A&A HVAC LLC and describe what is happening. We answer 24 hours a day.
How we handle heating repair
Safety check first
On any gas appliance we check for gas leaks, inspect the heat exchanger, and verify proper venting and combustion before anything else happens.
Airflow and filtration
Filter condition and static pressure, because restricted airflow causes both nuisance shutdowns and genuine safety trips.
Ignition and control sequence
We watch the system run through its full sequence of operation and identify exactly where it stops or misbehaves rather than replacing parts by guess.
Electrical testing
Sequencers, contactors, heat strips, limit switches, transformers, and control boards tested individually.
Findings and pricing before work
You approve the repair and the price before we start.
Verification
After the repair we confirm the temperature rise across the heat exchanger is within the manufacturer's stated range, which is the measurement that proves the system is running correctly and safely.
Why choose A&A HVAC LLC for heating repair
- Combustion safety and heat exchanger inspection are part of every gas furnace call, not an upsell.
- 24 hour availability during Valley freezes, when heating calls all arrive on the same night.
- Gas, electric, and heat pump systems all handled by the same technicians.
- We will tell you when the real fix is a filter and a fall tune up rather than a part.
Frequently Asked Questions
Why does my heater smell like burning when I first turn it on?
Why does my heat pump blow air that feels cool?
Do I need heating maintenance in the Rio Grande Valley?
Is it safe to keep using my furnace if it smells like gas?
My heat only works sometimes. Should I wait to call?
Do you repair electric heat strips?
Looking for something else? See all HVAC services, or browse our full FAQ.
Reviewed by the A&A HVAC LLC service team, licensed HVAC technicians serving McAllen and the Rio Grande Valley.
Last reviewed for accuracy on . Guidance here is general. Diagnosis of your specific system requires an on site inspection.