I have a 3 speed single phase A/C motor inside an indoor air-con blower and it runs very noisy (not mechanical/installation issue but just the fan moving air is noisy itself) even on its LOW speed setting. Can anyone advise a way to slow the motor speed down to about 50% of its current speed. I'm not too worried about the MED and HIGH speed setting but if can just do for LOW speed setting would be great. (If slow for LOW, MED and HIGH together is also fine.)
I looked at VFD's but they all seem to be for 3-phase motors. Also someone suggested to join the HIGH and MED speed wires on the motor to the LOW speed and at the controller to put HIGH and MED to Ground.
Thanks in advance for any help. Picture attached.