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Phil, Mechanical Engineer
Category: HVAC
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Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Friedrich Quad Zone mini split. On the two hard

Customer Question

I have a Friedrich Quad Zone mini split. On the two hard wired thermostat units I am getting a CH 43 Error after a few minutes. On the wireless remote units the Heating light blinks 4 times then the Cooling like 3 times.
Submitted: 6 months ago.
Category: HVAC
Expert:  gmac2905 replied 6 months ago.

Try cleaning the condenser coil (coutside coil) with a good strong stream from the garden hose, if its dirty, you'll have errors like your seeing.