Smoke Sensor failure 18 month old unit

[ChrisC12]

The Smoke Sensor failure comes up on one of my 2 Google Nests. The units are 18 months old, I have cleaned the problem nest, changed the batteries but nothing has fixed this issue.

Has anybody have similar and fixed the problem, I haven't reset the unit to factory setting as yet

Appreciate any help

[zoeuvre]

Hi ChrisC12, 

Yikes! Let me take a look at this for you. A few questions: 

• Are there any nearby sources of steam, smoke, or any other visible vapor?
• Any previous events with Nest Protect such as, false or legitimate alarms, chirps, or other unexpected behavior?
• How were you notified of the sensor failure?
• Does the reported sensor failure correspond with any recent construction, cleaning, or other activities in the house that could have introduced large amounts of dust or foreign particles into the environment?
• Is the Nest Protect near any air vents, fans, windows, or other sources of air flow that could bring dust or foreign particles into the detection chamber?
• Where is the Nest Protect installed (room, ceiling, or wall)?
• When was the last audio test?

I'll look forward to your response. 

Best,

Zoe