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ret_usn's avatar
ret_usn
Explorer
Dec 03, 2017

Thermostat change.

Changed my original thermostat to a Honeywell programmable on. added the switch for high speed fan. works great and easy mod
  • I changed mine out back in 2008 W/O adding the switch...just wired it for HI Speed all the time.
    NEVER used LO Speed anyway
  • DW says we may use slow speed sometime so that is why I installed the switch. it comes on at low unless the switch is on.
  • ret usn wrote:
    DW says we may use slow speed sometime so that is why I installed the switch. it comes on at low unless the switch is on.

    Only tine sliw can be used is in fan only setting
  • My test show the switch will control fan speed in either heat or cool mode with thermostat set on auto fan.