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Réparation d’une thermopompe centrale Bosch à Sainte-Rose
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Repair of a Bosch central heat pump in Sainte-Rose

When declining performance reveals a hidden problem

At AirGreen , we regularly receive service calls for Bosch central systems. These devices, renowned for their efficiency and robustness, can nevertheless show signs of wear after several seasons, which are essential to interpret correctly. This is precisely what happened during our recent intervention in Sainte-Rose, Laval , where a homeowner contacted us after noticing that his Bosch central heat pump was no longer adequately cooling his home.

Diagnosis: identify the origin of the lack of performance

Upon our arrival, our certified technician performed a complete inspection of the outdoor condenser . The Bosch model installed—a compact vertical unit connected to an indoor duct system—appeared to be in good general condition, but a few clues already guided our analysis:

  • The unit started, but the refrigerant pressure seemed abnormally low.

  • The fan was running intermittently, indicating a possible electrical problem.

  • No apparent leaks on the visible pipes, but a slight accumulation of moisture around the fittings.

Using our measuring instruments, we confirmed a refrigerant undercharge caused by a micro-leak on a solder joint. This is a common situation on units exposed to the climatic variations typical of Montreal and Laval , especially after several freeze-thaw cycles.

Repair: precision, cleanliness and efficiency

To restore the heat pump's performance, our team undertook a repair in three precise stages :

  1. Leak detection and sealing :
    We isolated the problem area and applied high temperature brazing to seal the detected micro-hole.

  2. Pressure and vacuum testing :
    After the repair, we subjected the system to an extended leak test to ensure no residual leaks, followed by a deep vacuum draw of over an hour.

  3. Recharging with R-410A refrigerant :
    We then recharged the device to the Bosch nominal pressure , ensuring optimal and safe operation.

Once the system was restarted, the temperatures measured at the outlet of the conduits immediately confirmed that the efficiency had been restored to 100% .

AirGreen Expertise: Beyond Simple Repair

At AirGreen, every repair is also an opportunity to optimize the system's durability . We took advantage of our visit to:

  • Clean the condenser fins to improve airflow.

  • Check the outside temperature sensor.

  • Advise the customer on seasonal maintenance, including minimum clearance around the unit (at least 60 cm).

This type of preventative maintenance not only helps prevent future breakdowns, but also increases the longevity of the compressor—a central element of the Bosch system.

Result: restored comfort and renewed confidence

Once the Bosch heat pump was repaired , the customer noticed an immediate difference:

  • A stable indoor temperature , without fluctuations.

  • Reduced outside noise thanks to a refurbished fan.

  • Normal power consumption returned after the overload caused by the underpressure.

We concluded our visit with a detailed maintenance report , including our recommendations for the next annual inspection before winter.

Why choose AirGreen for your Bosch repairs?

Our central HVAC systems teams are trained on several brands, including Bosch, Trane, Lennox, Goodman, and Midea. This expertise allows us to offer:

  • Precise diagnostics , carried out with cutting-edge equipment;

  • Original parts and repairs compliant with CSA and CMMTQ standards;

  • Fast service coverage across Laval, Montreal, Longueuil, the North Shore and the South Shore .

We know that a heat pump breakdown, especially during a heatwave or a winter thaw, can disrupt the comfort of a home. That's why we are committed to providing fast, courteous, and guaranteed service , while maintaining the highest industry standards.

AirGreen Tips to Extend the Life of Your Bosch Heat Pump

  1. Clean the area around the condenser regularly to avoid obstruction of airflow.

  2. Schedule an annual service with a qualified professional to check pressure, connections and performance.

  3. Watch for unusual noises or temperature variations: these are often the first signs of an imbalance in the system.

  4. Check drainage to avoid water accumulation near the base, especially if the unit is resting on concrete slabs like here in Sainte-Rose.

Thanks to these best practices, your Bosch heat pump will maintain its performance season after season, while optimizing your comfort and energy consumption.

AirGreen — Specialists in repair, maintenance and installation of HVAC systems in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
Contact us today for a complete diagnosis and professional service tailored to your needs.