An urgent service call for a stopped heat pump
A homeowner in Chomedey , Laval , contacted us after noticing that their Goodman central heat pump was no longer blowing hot air, despite the thermostat being set to heating mode. The outdoor compressor remained silent, and there was no noticeable vibration—a clear sign of a malfunction .
At AirGreen , we know that central systems require special attention, especially when they are installed high up on a wall mount, as was the case here. Our team attended the site the same day to diagnose the fault.
Initial inspection: safety, structure and power supply
Upon arrival, we first checked the stability of the wall mount . The installation, while sturdy, showed signs of slight corrosion at the base—a point we noted for future maintenance inspection. Next, we measured the supply voltage: a perfectly stable 240 volts.
However, the compressor and fan still weren't responding, so we opened the Goodman unit's electrical compartment to perform a complete inspection of the capacitor and start relay .
Diagnosis: a faulty capacitor
Continuity and capacitance tests quickly revealed the cause: a faulty dual capacitor (45/5 µF) . This component, essential for starting the compressor and fan motor, had lost nearly 70% of its nominal capacity. A classic failure that prevents the thermodynamic cycle from starting.
The clues were clear:
-
the bulging top of the capacitor indicated previous overheating;
-
no response from the compressor despite the voltage present;
-
slight buzzing noise when powered on.
Intervention: capacitor replacement and functional test
We replaced the capacitor with a genuine Goodman part , certified for heat pumps in this range. After securing the electrical connections and closing the panel, we turned the system back on.
Within seconds, the fan engaged and the compressor started normally . A check of the R-410A refrigerant pressures confirmed a stable and balanced cycle, with no overheating or subcooling.
We also took advantage of the intervention to:
-
clean the condenser fins using a low-pressure jet;
-
check the condition of the power and communication cables ;
-
tighten the main contactor connections .
Result: comfort restored and prevention assured
The system quickly returned to full performance. The client felt a constant, warm breeze throughout the house, confirming that the heat pump was once again operating optimally.
We recommended to him:
-
to have the capacitor checked every spring before the return of the warm season;
-
to have the outer coil cleaned to prevent any accumulation of debris;
-
to schedule annual AirGreen maintenance to maintain the manufacturer's warranty and extend the life of the compressor.
AirGreen expertise in Laval and Greater Montreal
Every HVAC system repair we perform in Laval, Montreal, Longueuil, the North Shore and the South Shore is carried out according to the highest standards of quality and safety.
Our team of certified technicians specializes in major brands— Goodman, Lennox, Trane, Fujitsu, Midea, Gree, Sharp —and is trained to quickly diagnose any electrical, mechanical, or refrigeration failure.
Our interventions are based on three pillars:
-
Accurate and transparent diagnosis ;
-
Durable repair with original parts ;
-
Proactive prevention to avoid future breakdowns.
Conclusion: a central heat pump ready for all seasons
Thanks to this intervention, our Chomedey client can once again count on his Goodman central heat pump to ensure constant comfort, summer and winter.
At AirGreen , we believe every repair is an opportunity to ensure the reliability and energy efficiency of our customers' HVAC systems—and to reinforce the trust they've placed in us for years.