About 8 years ago we had both a Janitrol furnace and A/C put in. We had nothing but trouble with coolant leaks on A/C from the beginning. We had A/C replaced in 2000. The furnace was no problem until 12/2000 when it started not coming on. We had to manually turn it off and then back on to get it to work. This has gone on for 2 years. No one seems to know what the problem is. We found that if we turn fan from auto to on for a few seconds and then back to auto, furnace comes on. Works fine when A/C is used. Any suggestions?