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agonzalezAug 23, 2025
What to do if my Bosch LM Heat Pump shuts off due to high pressure?
- WWilliam LeblancAug 23, 2025
Your Bosch Heat Pump might be turning off due to a high-pressure control if the discharge pressure is too high. In 'COOLING' mode, this could be due to lack of water flow, entering water that's too warm, or a scaled/plugged condenser. In 'HEATING' mode, it could be due to a lack of load-side fluid flow, an inoperative blower, or clogged filter/ductwork restrictions. Another cause could be the unit being overcharged with refrigerant, in this case reclaim refrigerant, evacuate and recharge with the factory recommended charge. Also, check for a defective or improperly calibrated high-pressure switch.
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