I have seen furnaces that have multiple circuit breakers in the unit . If yours has this , see if one goes to the heat strip ? If so , you can turn that CB off , in the summer . Or disable the heat strip by other means .
A lot of people wouls be better served with simpler tstats .
God bless
Wyr
A lot of people wouls be better served with simpler tstats .
God bless
Wyr