When your residential HVAC condensate pump stops working, several problematic events occur within your cooling system. First, moisture dripping from your indoor evaporator coil will quickly fill the plastic reservoir tank to the brim, causing standing water to overflow onto your floor or ceiling, leading to expensive water damage. Second, if your condensate pump is equipped with a low-voltage safety overflow switch wired into your HVAC control circuit, the rising water will trigger the switch to cut power to your air conditioning system automatically, shutting the AC down completely to prevent a major flood. You can troubleshoot by inspecting the reservoir water level. You can verify the root cause when fixing clogs or replacing a broken pump clears the water and restores normal air conditioning operation.
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