Furnace repair
Ignition, flame sensing, airflow, and limit issues are approached with safety first.
Heating repair
Furnace and heat pump diagnostics focused on safety, comfort, and straight answers.
Heating calls may involve ignition problems, airflow restrictions, thermostat issues, unusual smells or noises, heat pump defrost concerns, and emergency heat questions.
Safety first
Gas odor, smoke, flame rollout, or carbon monoxide alarms require emergency action. We keep that distinction clear from the first phone call.
Ignition, flame sensing, airflow, and limit issues are approached with safety first.
Reversing valves, defrost operation, outdoor fan operation, and backup heat are reviewed carefully.
Blank displays, bad settings, wiring concerns, and control failures can mimic larger equipment problems.
Frequently asked
Yes. Cornerstone provides 24/7 emergency heating and cooling service across our North Texas service area, including evenings, weekends, and holidays.
Arrival timing depends on location, weather, current workload, and urgency. We do not make exact promises over the phone, but same-day appointments are common — call for current availability.
Our technicians service common residential and light-commercial equipment across major brands. We are an independent service company and are not affiliated with any single manufacturer.
Age, repair history, comfort issues, efficiency, warranty status, and installation quality all matter. We walk through the trade-offs with you before you decide, and we never push a replacement you do not need.
Most homes benefit from a cooling tune-up in spring and a heating tune-up in fall. The Comfort Plan bundles both so it is easy to stay on schedule.
Ready when you are
Appointments available Monday through Saturday. Emergency service available 24/7.