I have a Lennox thermostat 67K4801 with numbers > and 3AAT89B38G1. > (Y1 G. O. R. L. T. C. W1. E.) I just purchased a Honeywell Programmabel to replace the old Lennox.
The wiring instruction booklet shows all alternate wiring combination, except how to connect the T terminal.
Please help!

Yan-san

T will not be used, tape it off, this is for a outside thermister.

I am attempting to replace a Lennox thermostat with a Honeywell. The fan function works but the heat pump unit will not.
The Lennox Heat Pump system thermostat numbers are 67K 4801 and 3AAT89B38G1. It has a Norm & EM Heat switch. Wire terminal connectors are G, Y1,R, L, T,C, W1, E, and O. Wires connections were: G-Green. Y1-Yellow, R-Red, L- none, T-none, C-Black, W1-white, E-none, O-Orange.
The Honeywell thermostat number is RTH7600 Series. Its heat pump connectors are: C, G, Y, O/B,RC, and R on the left side and Aux, E, and L on the right side. I have connected the wires as follows: C-Black, G-Green, Y-Yellow, O/B-Orange, RC&R bridge-Red, Aux&E bridge-W, and L-none.
Can you help?