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James YangAug 4, 2025
Why is my Bosch SM Split CS Heat Pump not cooling or heating enough?
- JJessica VillaAug 4, 2025
Insufficient cooling or heating in your Bosch Heat Pump can stem from several causes. The unit might be undersized, requiring recalculation of heating/cooling loads, possibly with added insulation. Leaks in ductwork or ambient air entering through doors/windows could cause loss of conditioned air. Inadequate airflow, often due to a dirty filter, can also be a factor. A low refrigerant charge leads to inefficient operation. Other potential issues include a defective compressor or reversing valve, restrictions or defects in the TXV, or contamination of the refrigerant system with moisture or non-condensables. Compare the unit's operating pressures to the pressure/temperature chart to diagnose the issue.
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