Field guides
HVAC questions before you condemn a part
A system that is low on air often looks like a refrigerant problem. Check the filter, the coil, and the drain before you swap a compressor.
- Confirm power is safe to touch and the disconnect is the one for this unit.
- Check filter, coil, dampers, and crushed flex.
- Confirm the condensate trap matches the manual and actually drains.
- If a heat exchanger or flue is suspect, shut the appliance down.
Common questions
Can Davina tell me the charge?
No. Pressures only mean something at known indoor and outdoor conditions, and charging is for a certified technician.
What if the flue looks rusty?
Shut it down and get a qualified person. Do not keep it running to finish the call.
Leer en español