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Jeffrey WellsAug 20, 2025
What to do if my Bosch Air Handler unit is off due to high-pressure control?
- BbrandiflynnAug 20, 2025
If your Bosch Air Handler shuts off due to high-pressure control, consider these potential causes: * **High Discharge Pressure:** If in 'COOLING' mode, check for lack of or inadequate water flow, excessively warm entering water temperature, or a scaled/plugged condenser. If in 'HEATING' mode, check for lack of or inadequate load-side fluid flow, an inoperative blower, a clogged filter, or ductwork restrictions. * **Refrigerant Overcharge:** The unit may be overcharged with refrigerant. If this is the case, reclaim refrigerant, evacuate, and recharge with the factory-recommended charge. * **High-Pressure Switch:** Inspect the high-pressure switch for defects or improper calibration.
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