How to replace Taco Zone heat valve on boilers heat and central heating. Yours may be leaking or stuck and needs replacing troubleshooting. If you don't have heat in part of your home this is often the issue and it's something you may be able to do yourself. See how I replace my zone valve in just a few minutes. TACO Boiler Zone Valve Disclaimer: Due to factors beyond the control of Silver Cymbal, I cannot guarantee against improper use or unauthorized modifications of this information. Silver Cymbal assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. Silver Cymbal recommends safe practices when working on machines and or with tools seen or implied in this video. Due to factors beyond the control of Silver Cymbal, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Silver Cymbal.