There could be several reasons why your furnace fan is running but not producing heat. Some possible causes include a malfunctioning thermostat, a faulty heating element, a clogged air filter, or a problem with the fan motor. It is recommended to contact a professional HVAC technician to diagnose and fix the issue.
Furnace is an enclosed chamber in which heat is produced
To turn off the furnace in your home, locate the power switch or breaker for the furnace and switch it off. This will stop the furnace from running and producing heat.
I finally had the repairman to fix the furnace, the heat it produced was spasmodic.
The water being held in the water tank when the furnace shuts off is at a set temp, the water tank hopefully is insulated, as time passes, the water temp has to drop because the furnace has not come on to maintain the set temp, also the controller could be faultly that controls the water temp for the hot water heater, the only time you have hot water is when the furnace runs.
when running the heat-pump the air blowing from the heat ducts is not hot ( it's to cold for the heat-pump). you have a main furnace and it won't turn on ( is thermostat selected for this source), ( is the power switch for main furnace on ), ( is fuse for this furnace good). If these are good (check thermostat wiring at thermostat, and transformer).
The energy source is the same as for heating anything. Gas,Electricity, Burning any fossil fuel. in a boiler (furnace) with water running in heat exchanging coils or manifolds. When heat is needed a pump circulates the hot water through the radiators and back to the furness.
All three.A furnace burns something, this creates heat which can dissipate in those 3 ways.All 3 occur:Radiation: the fire radiates heat which can be seen with infrared goggles.Convection: The fire heats up air which rizes and leaves the system.Conduction: The fire heats up the materials of the furnace, causing the heat energy to heat up the air on the outside of the furnace, which in turn convect.
Oil is burned in a furnace as fuel to produce heat. Running through the furnace is a series of pipes containing water. The water turns to steam with the heat - which is then used to turn turbines. The turbines generate the electricity.
Thermal energy from the furnace is transferred to the radiator through convection. Heated air or water circulates through pipes from the furnace to the radiator, where it releases heat into the room through a process called convection. This heat transfer warms the surrounding air in the room.
The air and combustion products blend in the combustion chamber of a gas furnace. This is where the fuel and air mixture is ignited and the heat is produced.
There is always a wall thermostat for regulating furnace heat.
Steam is generated by heat from the combution of fuel in a furnace or by waste heat from a process. The heat is transferred to water in the boiler shell, which then evaporates to produce steam under pressure.