What should you do when a condensate pump stops working? The symptom narrows the next observation but does not identify a failed part. For the heating and cooling system, first separate what the thermostat or normal controls request from what the indoor and outdoor equipment actually do. Note airflow, temperature change, timing, sound, odor, visible water or ice and whether the problem affects one room or the whole home, without opening a panel or reaching into equipment.
Tell the service company the pump model, water location, sound and timing, discharge destination, connected equipment, and damage risk, then ask whether cleanup, tubing correction, pump replacement, and HVAC testing are included. Freezing weather, drain-disposal code, lift and routing constraints, attic or finished-space placement, and secondary-protection requirements vary locally and can determine the proper correction. Turn the HVAC system off if water is overflowing or approaching electrical equipment, then note reservoir level, pump sound, visible discharge-line condition, alarm or safety-switch behavior, and where water appears. A silent pump, a pump that runs without moving water, a blocked or frozen discharge, a leaking connection, and condensate produced faster than it clears are different inspection paths. A technician can safely test power, float and safety controls, pump operation, check valve, tubing route and termination, while also checking why the system is producing or retaining abnormal water.