Austin is a hot-humid climate where peak demand is in June–August, so many systems are set up primarily for cooling and furnaces sit unused most of the year; that infrequent use can cause ignition failures when cold weather arrives. The city’s occasional winter freezes — like the 2021 freeze that stressed many local systems — show why homeowners in neighborhoods from East Austin to Barton Creek should test their heating before temperatures dive. High humidity also accelerates corrosion on controls and flues, especially in older bungalows and mid-century homes around the central city.

Common local furnace problems include failed ignition or pilot assemblies from long idle periods, cracked heat exchangers in older gas furnaces, and rusted or corroded burners from humid conditions. Attic-installed furnaces and ductwork in older homes around Travis Heights or South Congress often suffer from rodent damage, loose wiring, and leaky ducts that reduce heat delivery. Thermostat miscalibration and tripped breakers are frequent simple causes — check those before assuming a major repair is needed.

Before calling for service, change the filter and inspect the circuit breaker and thermostat batteries; if the furnace still won’t start, look and smell for gas and carbon monoxide detectors and ventilate the home if you suspect a leak. Schedule a fall heating check in October or November to catch ignition issues and test safety controls; during rare freezes, run the heat briefly every few days so components stay lubricated and electrical contacts don’t seize. For any gas-line, heat-exchanger, or CO concerns, do not attempt DIY repairs — call emergency service immediately.

Plan preventive maintenance in early fall when HVAC contractors are less booked than during summer AC peak months, and get attic and duct insulation checked to improve efficiency before cold weather hits. We also service nearby Cedar Park and other suburbs, and offer 24/7 emergency repairs for freeze events when demand spikes suddenly across the region. Keep a working carbon monoxide alarm and document your furnace model and last service date so technicians can diagnose issues faster on the first visit.