Samsung Gen 6 fault 153

Indoor floating switch secondary detection

Heat pump

What it means

Secondary detection of the indoor unit float switch (condensate) fault.

Likely causes

  1. Faulty indoor unit float sensor
  2. Faulty connection at PCB connector CN5

Where to start

  1. Check indoor unit float sensor
  2. Check indoor PCB connector CN5 (black)

The full answer, free

  • How to put it right, step by step
  • The manual page for this fault (page 52), right under the answer

Safety: Isolate the outdoor unit and any backup heater, and give the inverter capacitors time to discharge before you open the electrics. Anything on the refrigerant circuit needs F-gas certification.

From the Samsung manual for the Gen 6. Check the model on the data plate before you order parts.

Other Samsung Gen 6 fault codes