Yes, if you have two zones. Most furnaces (forced air) have but one zone. Zone dampers must be added and special consideration to original duct design must be made by a professional.
The thermostat that is set higher will turn the system on if two thermostats are wired in parallel. You can use any number of thermostats on the system. What you probably want to get is a zone control system. Each room gets heat regulated as desired because the controller manages not only when the furnace turns on but also when dampers open to deliver heated air to the various rooms that are being controlled.
The electric furnace operates on 240 volts so a two pole breaker is needed.
No, just one.
The 2.4L does have two coolant thermostats.The 2.4L does have two coolant thermostats.
no just one.
All engines have just one thermostat. It depends on which 2.4l. The PT Cruiser has one. The Sebring has two thermostats.
Yes. The 2.4L has two thermostats.
Itrelay depends on how old the furnace is modern units have a computer chip that controls the unit as older ones do not. I wold check the low voltage wiring to the thermostat. If that is not the problem and you are using two separate furnace one up stairs and one down I would check the transformer. How ever if one furnace heats both stories it could be a bad connection in the low voltage wiring or a broken wire. However I recommend a new thermostat simply because your old thermostats are probley out dated and very inefficient If this dose not help e-mail me at 8120355@gmail .com
Cooling system theromostats - no. Only one
yes one to bring in the fan and one for water
If you replaced the furnace and thermostat this past winter, and now the A/C doesn't work. You probably just have a loose control wire. Check the yellow wire at the stat. It should be on the Y terminal. Next, look inside the furnace at the terminal block. The condenser wire should have two conductors. One hooks up with the yellow wire on the Y terminal of the terminal block. The other hooks to the C terminal. Always turn off the breaker to the furnace before working on any wiring. No need to fry the transformer.
No, only one thermostat. It does have two temperature sensors though.