So HVAC-Codes here on the West-side-Change day to day. Someone told me that California is requireing a Common wire on the programable Thermostats and not to use the Batterys-you know---Blue wire LOL.-----They say that the batterys are expireing too fast and are going straight to the Land-fill.----Sooo-If a Tech finds a T-stat with 4-wire---They have to charge for a new-compliance Stat! and 5-wire.----Wow Help????
Is this B.S