Understanding a furnace that stops heating
A furnace can appear completely unresponsive even when the fault occurs after the thermostat asks for heat. Another unit may start its fan, make several ignition attempts, then shut down without warming your rooms. We approach furnace repair by identifying where that sequence changes, rather than treating every cold house as an ignition problem. Your description of the sounds, timing and thermostat display helps us establish a useful starting point.
If you are searching for furnace repairs, tell us whether the problem affects the whole home or particular rooms. Include whether the equipment stops after a few seconds, runs for several minutes, or never seems to begin. We use these distinctions to separate a missing heat request from a combustion, airflow or control issue. A request starts a discussion about the work required, not a promise that a particular part needs replacement.

