Code 85 — Low contactor open

What does 85 mean?

The low stage contactor is stuck open, meaning it is not allowing power to reach the low stage components when it should.

• Faulty low stage contactor
• Wiring issue to the low stage contactor
• Low voltage signal to contactor

Click steps to track your progress.

1. 1

   Inspect the low stage contactor for damage.

2. 2

   Verify wiring connections to the contactor.

3. 3

   Check the control signal voltage activating the contactor.

4. 4

   Contact an HVAC technician for diagnosis and potential replacement.