How does a thermostat turn on a blower fan?
If the W terminal is energized, it turns on the heat and the fan at the furnace. If the Y terminal is energized, it turns on the a/c outside unit, but not the blower fan. Typical thermostats will energize the G terminal when in cool mode, or when the fan is turned to manual “always on” mode.
Why does my HVAC fan not work in cool mode?
Typical thermostats will energize the G terminal when in cool mode, or when the fan is turned to manual “always on” mode. It sounds to me like the G terminal is not being energized. It could be at your thermostat, or at the furnace. The G wire could be broken, open, disconnected somewhere.
Why is my Honda radiator fan not working?
If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.
Why does my Jetta not have a cooling fan?
Simply the engine is not hot enough to turn on the cooling fan, its not hot enough outside, you are driving getting plenty of air flow through the grille to keep things cool without the assistance of the fan. Its possible that you have no problem at all. Was this answer helpful? I got a 2002 Jetta the cooling fans don’t turn on .
Why does my fan not come on when the thermostat is on?
Move the lever on the thermostat to the “ON” position. The fan blower should come on. If it doesn’t then you probably have loose or burnt wires in behind the relay or you may need a new fan relay or circuit board. 2. Many times wires are either loose or burnt behind the fan center relay.
What to do if your fan won’t turn on?
Even if the current temperature is below the desired temperature, the fan will not start if it is in “Cool” mode. Likewise, the fan will not start even if it is too hot if the thermostat is in “Heat” mode. Check your circuit breaker and reset or replace any fuses as needed.
How does an inside fan work in an AC unit?
It works like this- when the fan switch on the thermostat is in the auto position and the thermostat is satisfied on a call for cooling [ie: shuts off the cooling] the fan relay keeps the indoor fan running for about a minute or so to purge the cooling coil section and ducts of any residual cool air…
Why does my AC fan not run in auto mode?
Here are the symtoms. The outside unit keeps running when COOL on. The inside FAN doesn’t run when in AUTO mode. If I leave the FAN ON then the AC works fine Cooling correctly. Is the thermostat not working correctly or something in the AC unit causing it to do this?