Nest thermostat

[Tomshea]

$700 in repairs.  Latest nest thermostat cost me in repairs I  connected  according to instructions with special adapter with C wire connection, within 1 hour fried my circuit board on furnace.  I been  usually 1st generation with 2 wire connection for  several years with no problem, my plumber told me I was the third person this happened to.

[Houptee]

Probably connected the adapter wrong.

I always tell people to just run a new thermostat cable and have a real C wire but they never listen to me.

They say they cant run a new wire but someone ran the wire that is there now LOL.

[Patrick_Caezza]

Good chance the installation was done wrong. Why would you ask a plumber?

You said you only used two wires with a 1st gen. Two-wire-only systems can be a pain if you don't know what you are doing setting them up.

[aatienza]

Hey Tomshea,

Checking in — we hope you've got the answer you're looking for. Let us know if you have more questions in mind.
 

I appreciate the help, Houptee and Patrick_Caezza.

Thanks,

Archie

[aatienza]

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have. 
 

Thanks,

Archie

[aatienza]

Hello there,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.
 

Thanks,

Archie