Seems to happen once a week for some reason on thursdays. After I switch the breaker off I can hear something in the furnace click before I can get the cover off. Probably something resetting . Is this a bad sequencer. The part number I have is 15sh22 and the furnace model is EB20B. Any help will be appreciated. Thanks Lee

Probably,,

,I`d say you have a pretty smart furnace to know when Thursday rolls around each week

Yea that's what I thought , I replaced the thermostat and thought it was fixed until Thursday rolled around and it was 81 in my house. So you think a sequencer will do it