No Heat

When this becomes an emergency

• The set point is well above room temperature and nothing responds at all.
• Indoor temperature has fallen steadily since the evening and keeps dropping.
• The circuit for the heating equipment won't stay on.
• Floors and exterior rooms have gone noticeably cold before the thermostat reacted.

What a pro does

Electricity comes before mechanics. A tripped breaker, a service switch someone bumped in a dark basement, or a blown low-voltage fuse produces a dead system that looks exactly like a failed board, and confirming power takes minutes while chasing parts takes an afternoon. From there the sequence runs to thermostat wiring, the safety string, and whatever the control is reporting. Most of these calls end at a switch that did its job. Snow blocking a vent termination belongs on that list too, because sealed-combustion equipment stops itself rather than run without proven airflow, and after a heavy blow that's a frequent finding on the first visit of the day.

Frequently asked questions

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