Hi -- I'm hoping someone can answer a question that I haven;t been able to find an answer to. I have an older oil-fired furnace,with a tankless hot water system. The furnace will "cycle on" every so often, and run for anywhere from 5-10 minutes. The thing is, it does this year-round, even when the heat is off, and no hot water is being used (i.e., no sink faucet turned to hot, no showers running). And because I don't have a hot water tank, it's not like it needs to run to keep the temp up for that..... The only time I can get it to not run at all is if I turn off the emergency boiler switch to cut the power. Obviously, an old furnace + cost of oil = me not wanting the furnace running all the time. Any ideas would be appreciated - thank you!