There was a hi lo switch and the on off with timer.
Attic fan timer on off and timer.
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Take them off and connect them to the timer.
Enerlites programmable digital timer switch for lights fans motors 7 day 18 on off timer settings single pole neutral wire required ul listed het01 c white 4 2 out of 5 stars 790 19 99 19.
After 20 years of flawless service an intermitic whole house fan timer quit working.
I left the hi lo in place because i didn t feel that there was enough need to figure that one out.
There should be two wires on the on off switch.
I had the same situation with my fan.
Quietcool accessories white 12 hours digital whole house fan timer.
1 16 of 66 results for attic fan timer switch intermatic ei220w 1 2 4 8 hour spst 1800 watt in wall countdown timer white.
The timer automatically turns off when time has expired.
When installing with direct drive fan model you must have the bws2 2 speed fan control switch as well.
4 3 out of 5 stars 1 258.
What i did was remove the on off with timer module and replace it with a ge in wall on off paddle switch.
If the timer is labeled line and load.
Intermatic fd12hhw 12 hour spring loaded in wall timer switch for auto off control of fans and lights with hold white.
There should be two white wires currently connected and capped.
I use automation with my fan and it works great.
81 5 28 oz get it as soon as.
Up to that time changing settings was relative easy one page instruction easy to follow not too many steps involved for 4 fresh air cycles daily.
The master flow 12 hour timer when installed on master flow belt drive and direct drive whole house fans can be set for any time from 10 minutes to up to 12 hours.
The two wire black is line and the load goes to the center terminal of the hi low switch.