Repair of a Goodman Wall-Mounted Heat Pump in Saint-Bruno

An outdoor heat pump completely shuts down after a storm

At AirGreen , we were recently called to Saint-Bruno , on Montreal's South Shore , to diagnose and repair a Goodman wall-mounted heat pump whose outdoor unit was no longer starting. The customer had just experienced a violent storm accompanied by a brief power outage—and since then, there has been no sign of life from the compressor.

This typical failure, often caused by a power surge or electronic board failure, required careful inspection to avoid unnecessary compressor replacement.

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Initial inspection: a stationary compressor and a silent power supply

Upon our arrival, we carried out a complete visual check of the installation.
The Goodman outdoor unit, securely mounted on galvanized steel wall brackets, had wiring in good general condition . No signs of burning or oxidation were visible at first glance.

Our measurements, however, revealed:

• No voltage at the outdoor unit terminal block.

• A partially tripped circuit breaker in the basement electrical panel.

• A blackened power supply circuit board at the main relay.

These signs indicated a surge caused by lightning , a common scenario during summer storms in Quebec.

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In-depth diagnosis: burnt-out control board and blown thermal fuse

We then carried out a detailed electrical diagnosis:

1. Continuity check on the thermal fuse on the control board.

2. Power contactor coil test — no response.

3. Compressor and fan verification via direct power supply (bypass test): both components were functional.

So the verdict was clear: the main control board had suffered a power surge .

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Repair steps: rigor and safety

Our AirGreen team carried out the repair following a strict protocol:

1. Securing the electrical circuit

• Complete power cut at the source.

• Disconnect and isolate control wires.

• Check that the main circuit breaker and neutral wire are in good condition.

2. Replacing the control board

• Installation of a new original Goodman electronic card , compatible with the installed wall-mounted heat pump model.

• Application of a dielectric protective varnish to prevent future corrosion.

• Restoration of the wiring according to the manufacturer's diagram.

3. Recalibration and complete test

• Reconnecting the indoor thermostat and synchronizing the communication signal.

• Start-up test: The outdoor fan started running immediately , followed by the compressor activating after 15 seconds.

• Checking the R-410A refrigerant circuit pressure: stable at 115 psi at rest and 380 psi under load.

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Final result: restored comfort and enhanced safety

After 40 minutes of continuous testing, the Goodman heat pump was working perfectly in both heating and cooling mode .
The customer noticed:

• A reduction in operating noise compared to before.

• Better thermal stability inside.

• Faster response to thermostat demand.

We also installed an AirGreen surge protector on the electrical circuit, an essential precaution in residential areas prone to frequent thunderstorms.

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AirGreen Expertise: The Difference in Every Detail

At AirGreen , every HVAC system repair is carried out with method, precision and transparency .
Our qualified technicians work on most major brands: Goodman, Midea, Fujitsu, Daikin, Gree, Trane, Sharp, and more.

Our guarantees:

• Precise and documented diagnosis.

• Use of appropriate replacement parts for each unit.

• Energy optimization after repair.

• Personalized advice for the longevity of your device.

We cover all of Greater Montreal, Laval, the North Shore and the South Shore , and we respond to all types of breakdowns, whether it is compressor, electronic card or refrigerant problems .

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AirGreen tips to avoid similar breakdowns

To protect your Goodman wall-mounted heat pump:

• Install an HVAC surge protector directly on the power circuit.

• Turn off the power during severe thunderstorms .

• Clean the outdoor unit twice a year to prevent overheating.

• Have the electronic card checked every 3 to 4 years.

These simple actions extend the life of your system and reduce the risk of costly breakdowns.

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Conclusion: A Goodman heat pump saved by AirGreen expertise

Thanks to a quick and methodical intervention, the Goodman wall-mounted heat pump in Saint-Bruno regained its full performance without the need for a complete replacement.
A new demonstration of AirGreen know-how , combining technical expertise, diagnostic precision and commitment to the lasting comfort of our customers.