If you are experiencing frequent draft damper solenoid failures, the problem could be due to condensation and creosote buildup causing the draft door to stick shut. If the damper solenoid can not open the draft door it will fail. Sometimes the damper solenoid just needs a little help. The problem can be eliminated, or greatly reduced, by the installation of this spring-assisted solenoid linkage. the spring-assisted feature of this linkage effectively increases the force exerted by the solenoid alone, providing more consistent draft door operation. The kit comes complete with all the necessary hardware and instructions, the installation is quick and easy using simple hand tools.. This spring-assisted draft damper linkage is suitable for installation on all Central Boilers.