My honeywell thermostat is flashing a red light. I looked at my furnace and had water on my basement floor. I took off the panels on the furnace and noticed water (not a lot) inside. I noticed some gunk at the end of my drain pipe. I poured water down my furnace resevoir drain hole and a gelatinous goo shot out the drain pipe. I'm guessing that something "grew" in my drain pipe over time and backed up the water in my resevoir. It now flows fine. My problem is I can't get the red light to stop blinking. I shut off the circuit breakers for about ten minutes, but still a flashing light. Any suggestions?