Describe your heating problem.
The heat will not start
Say whether the thermostat calls for heat and whether the equipment responds. Mention any displayed error code without opening the equipment.
Cold rooms or weak heat
Explain whether the whole home or only certain rooms stay cold. Tell the provider whether you have a furnace, heat pump or another heating system.
Repeated shutdowns or unusual sounds
Note when the sound or shutdown occurs and how long the system runs. A phone description is not a diagnosis; a professional may need to inspect the system.