1991 KeepRite Mid-Efficiency Furnace – No Ignition Attended for a no ignition issue on a 1991 KeepRite mid-efficiency furnace. Cleaned the sparker and burners, restoring proper ignition. The filter was extremely clogged and was replaced with the client-supplied filter. Completed combustion testing and temperature rise readings. The system is currently operating normally. Due to the age and condition of the furnace, replacement is highly recommended, but the client will monitor performance for now.