Code P1 suggests the bottom tray is full. Carefully move the unit to a drain area, remove the bottom drain plug and let the water drain away. Restart the machine until the "P1" symbol disappears.. Customer: Hi just purchased a Toshiba AC and after 2hrs got the P1 code I drained it started it again then after a few min got the AP code? Contractor's Assistant: When did you last replace the air filter for your Toshiba air conditioner? Are the air vents unblocked? Customer: Vents are clear this is a new unit bought yesterday Contractor's Assistant: How long has this been going on with your.
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Author: Ralph P. Sita Ralph P. Sita is a seasoned professional with deep roots in both the HVAC and tech industries. His family's business, Ralph P. Sita, Inc., is a locally owned and operated HVAC contractor with over 42 years of experience, serving the DC, Maryland, and Virginia areas.. What Causes a P1 Code on a Mini Split? Voltage Surge ; Over Voltage; Low Voltage; Bad Power Supply; Power From Circuit Breaker Wrong; System Leakage or Blockage ; Loose Connections ; Main PCB Board ; The main control board is programmed to send out a P1 code when a low or high voltage is detected. This includes the power supply in the unit or.