By Billy Kobin, Bangor Daily News Staff AUGUSTA — Lawmakers will consider rolling back strict new rules requiring Mainers to disconnect fossil fuel-burning furnaces and boilers to claim the largest heat pump incentives. A proposal from Senate President Troy Jackson, D-Allagash, would “seek to find some middle ground” by removing some of the new rebate rules on installing whole-home heat pump systems in specific areas of the state based on temperatures, his spokesperson, Christine Kirby, said Monday without sharing more details on the proposal.