Your compressor should shut off cleanly when the thermostat says it’s done. A stuck contactor can keep power flowing — running the system nonstop.
Chatterbox can detect this by noticing continuous amp draw even when the thermostat cycle ends.
This fault can quickly burn out the compressor or rack up high electric bills.
Once detected, replacing the contactor is an easy fix — but catching it in time is what saves the day.
Image: Technician pointing to an HVAC contactor with arcing marks, glowing amp line overlay.
© 2025 Two Sense LLC. All Rights Reserved.