π¨ Smell gas? Get out first Leave the house, do not use switches or phones inside, and call the gas utility emergency line from outside. Then call us.
π‘οΈ Check the thermostat Make sure it is set to Heat or Cool, the set point is above or below room temperature and the batteries are fresh.
π Check the breaker and switch Look for a tripped breaker labelled furnace or AC, and the light-style service switch on or near the furnace.
π§Ή Look at the filter A completely clogged filter can shut a furnace down on high-limit. If it is grey and caked, replace it.
βοΈ Frozen AC? Switch to fan If you see ice on the indoor coil or lines, turn cooling off and the fan on so it can thaw before we arrive.
πΏ Leaking water heater Turn off the cold water valve above the tank and set gas heaters to Pilot or switch off the electric breaker.