05/19/2026
🚨 Public Service Announcement for Homeowners Using Older Nest Thermostats 🚨
If you have a 1st or 2nd generation Nest thermostat connected to your HVAC system, especially on a 4-wire setup, this is something you need to know.
In October 2025, Google officially stopped providing software updates for these older Nest models. Since then, we’ve seen multiple cases where outdated thermostat software has contributed to major HVAC system failures, including compressor damage on brand-new equipment.
Here’s what can happen:
• The thermostat may cause the system to short-cycle
• Rapid on/off operation creates excessive amp draw
• Internal compressor components can become permanently damaged
We’ve personally seen several compressor failures tied to these setups, particularly when paired with PCM-controlled equipment.
A thermostat may seem like a small part of the system, but incorrect communication and timing can create very expensive problems very quickly, especially during Oklahoma summer temperatures.
If your thermostat is older, or you’re unsure what model you have, it may be worth having it evaluated before peak cooling season hits. Visit PinkVanTechs.com to schedule!
Need plumbing, electrical, or HVAC services in Oklahoma City? Turn to a full-service company that goes above and beyond for its customers. Call for a free estimate!