mode_heat
Heating
Pick the equipment that’s acting up. We then rank the likely causes — free, safe, common checks first.
mode_heat Gas furnace (forced air)
Natural-gas or propane forced-air furnace, conventional or high-efficiency condensing.
heat_pump Heat pump
One machine that heats and cools — hence it lives on two shelves.
mode_heat Electric baseboard
240-volt (or 120-volt) resistance baseboard heaters on a wall thermostat or built-in dial.
thermostat Thermostat
The wall thermostat that controls your heating and cooling.
mode_heat Electric furnace (central forced-air)
A central forced-air furnace that heats with electric elements instead of gas.
water_heater Boiler & radiators (hydronic)
A hot-water boiler feeding radiators or baseboard convectors.
fireplace Gas fireplace
A natural-gas or propane fireplace or insert.
mode_heat In-floor radiant heat
Hydronic (warm-water) or electric in-floor heating.