Unit does not power on at all; no lights on indoor display and no response to remote.

Safety first: Always turn OFF the main breaker before opening any electrical panels.

• Step 1 – Check household breaker: Locate the breaker feeding the Klimaire system and reset it if tripped. If it trips again immediately, do not force it; there is likely a short.
• Step 2 – Inspect outdoor disconnect: Verify the pull-out or breaker at the outdoor unit is in the ON position and any fuses are intact.
• Step 3 – Confirm indoor power indicator: Some Klimaire models have a small LED on the indoor PCB. Remove the front cover and check if this LED is lit when power is applied.
• Step 4 – Internal fuse check: With power OFF, inspect the indoor and outdoor PCBs for small glass or blade fuses. Replace only with the same rating if blown. If a fuse blows again, a shorted component must be located by a technician.
• Step 5 – Board replacement: If supply power is present but the indoor unit remains dead, the indoor main PCB power supply may have failed and will need replacement.