How Mercury Thermostats Work

Today I discuss how a mercury thermostat works and what the inside of one looks like. I did fail to mention the O and B terminals are for heat pumps, O energizes when it is set in cooling and B energizes in Heating. This will vary depending on what type of system you have.





DISCLAIMER: I AM NOT RESPONSIBLE FOR ANY DAMAGES DONE TO YOUR SYSTEM, IT IS HIGHLY RECOMMENDED THAT YOU HAVE A PROFESSIONAL TO PREVENT DAMAGE THAT MAY BE CAUSED IF DONE IMPROPERLY. I AM ALSO BY NO MEANS A *PROFESSIONAL* HOWEVER, I AM VERY KNOWLEDGEABLE ABOUT HVAC AND I DO WORK FOR A HVAC COMPANY DURING THE SUMMER WHEN IM NOT AT SCHOOL.**PERFORM AT YOUR OWN RISK!**