Has The Honeywell YTH9421C1010 Been Discontinued?

Has The Honeywell YTH9421C1010 Been Discontinued?

As of April 14, 2015 the manufacturer discontinued the Honeywell YTH9421C1010 thermostat. It was first introduced March 30, 2009 and quickly became a very popular thermostat. The YTH9421C1010 was what they call a communicating thermostat. Communicating thermostats can operate with fewer wires and are proprietary, meaning that they are the only thermostat which can be…

Will My Honeywell Vision Pro Thermostat Work Without Batteries?

Will My Honeywell Vision Pro Thermostat Work Without Batteries?

Yes, your Honeywell Vision Pro Thermostat will work without batteries. The thermostat uses 24-volt power from the furnace, and batteries are for backup in case of a power failure. During a power outage, your furnace will be dead. So, why will you need a backup set of batteries? You won’t get the correct answer unless…

Can I Buy R410A Refrigerant Without A License?
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Can I Buy R410A Refrigerant Without A License?

This is an important and confusing question to answer. Especially if you need to buy some R410A refrigerant. If you get the wrong answer you could be breaking the law. I’ve been in this refrigerant licensing game from the beginning. If you think it’s confusing now, you should have been around in 1990 when they…

Can I Legally Install My Own Furnace?
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Can I Legally Install My Own Furnace?

In most jurisdictions, the answer is yes. You can install your own furnace in your own residence, but you may be required to get a mechanical permit. My daughter just installed her own furnace in Washington. She called the city to get permits and got an inspection. This is an affiliate site. The links may…