Do not bypass the safety switch or you could have a huge water mess in your home.
Safety switch in the attic.
And if you remember that you have a float switch you can easily go into the attic and examine the ac systems drains.
Even if the blower is in a utility closet or crawlspace the damage from a leak can be substantial.
Having disconnected a 3 wire wall switch to an attic mounted whole house fan is it safe to leave live wires capped in the switch box covered by flat plate.
This switch could be the problem.
Float switches are great and can save anyone the headache and expense of coming.
Just an fyi my installers charged me 500 00 which i thought was good considering the work that was needed.
If these items do not solve your problem call an hvac service professional to help.
If your blower is in your attic the water can leak through your ceiling and cause serious damage.
Electrical safety and unused attic wiring electrical question.
Is it safe to leave live wires capped in switch box covered by flat plate.
Wherever that extension cord is connected to power you could extend that circuit from there to the poe and then connect the poe.
It is perfectly safe to install a switch in the attic.
Luckily most hvac companies install a drain pan and float switch to help you avoid these sorts of problems.
There is a safety switch installed in the attic that you can engage that will cut the power to the lift in case you are going away for awhile or for whatever other reasons.