Have a Lennox G40UHX, Honeywell HZ311 Zone Panel, T-stat Focus Pro6000 (TH6110D1005) and Pro5000 (TH5110D1006). Heater does not come on but fan works on t-stat 6000 (downstairs). Heater comes on with t-stat 5000 (upstairs). All is new, Jan 10, and 6000 heat worked about 2 months ago. Purged zone panel, turned heat on and heard click from t-stat (6000), took a peak at zone panel and all green LEDs on zone panel. LEDs (green & red) on Lennox blink together at 1 sec intervals. Need help...