thermostat is commonly used to regulate the heat of a furnace. It can programmed to maintain a desired temperature by turning the furnace on or off as needed. Some thermostats have additional features such WiFi connectivity, smart home integration, and scheduling options.
A thermostat regulates heat.
Thermostat
The heat exchanger in a furnace is the primary component in a furnace. That said, their are circuit boards, motors and other components that can also fail regardless of the age of the heat exchanger. In my opinion, if you can afford to replace the furnace, you would be much better off. The cost of the heat exchanger with labor is probably not too much less than replacing the entire furnace.
Your location matters. If in Florida heat pump in more northern climes furnace & ac.
Yes
Furnace, woodstove, heater
thermostad
thermometer
Thermostat
A device for regulating furnace heat is the thermostat. A programmable thermostat can be set to control the temperature inside the home on a regular schedule. The thermostat is set to a desired temperature and then the furnace turns on and off to accomplish the desired heat level.
There is always a wall thermostat for regulating furnace heat.
Yes, you're right that's called thermostad.