Today I arrived on site Heating System Repair:Replaced the malfunctioning GVD-7 Damper. Replaced the leaking LWCO sensor. Upon arriving at the property, The client gave me access to the boiler unit. I explained to the client about the repair that will be performed on this visit. I proceeded to drain the system. I proceeded to disassemble the defective LWCO sensor. I proceeded to uninstall the defective GVD-7Damper. I proceeded to install the new parts mentioned. I concluded with the repair and installation of the new parts. I proceeded to bleed the system. I concluded with the system bleeding successfully. Start the system and monitor for about 20 minutes. Note: Giving the last check of the system before leaving the client's property and giving this repair as finished, I noticed that the boar control of this unit has a short circuit in the GVD Damper cable. I showed it to the client and explained that we must return a new control module to install in the system. The exis