Improper venting. Any furnace that burns gas be it fuel or propane necessitates an air source for that combustion method, plus a venting method to expel combustion gases. Your furnace technician will check for proper ventilation throughout typical support phone calls. Evaluate rates from nearly 3 execs — and use http://zanefypfx.free-blogz.com/42403214/the-2-minute-rule-for-furnace-maintenance-chatsworth-ca