Yes, a malfunctioning or bad condensate pump can easily cause your entire air conditioning system to stop working entirely, depending on how it is wired into your HVAC safety control circuit. Modern residential heating and cooling installations frequently incorporate an auxiliary safety overflow switch or wire the condensate pump's built-in safety overflow relay directly into the low-voltage 24-volt thermostat control circuit (specifically breaking the "R" or "Y" circuit). When the pump fails, fills to overflowing, or jams, this safety switch trips automatically to cut off control power to the outdoor condensing unit, shutting the AC down to protect your home from severe water damage. You can troubleshoot by checking the pump reservoir water level. You can verify that the pump caused the shutdown when fixing or replacing the faulty pump restores full low-voltage power and gets your AC running again.
1 votes
Marked as accepted