Home » Some of Our Service Calls in Greater Montreal » Repair of a Daikin wall-mounted heat pump in Rosemont–La Petite-Patrie
Réparation d’une thermopompe murale Daikin à Rosemont–La Petite-Patrie
Reading time: 4'

Repair of a Daikin wall-mounted heat pump in Rosemont–La Petite-Patrie

Rapid intervention to restore comfort to a Montreal home

At AirGreen , we were called to intervene in the Rosemont–La Petite-Patrie neighborhood of Montreal , for a Daikin wall-mounted heat pump that was no longer heating properly at the end of spring. The customer, concerned about seeing his unit emitting an intermittent noise and noticing a significant drop in performance, contacted our team for a complete diagnosis.

On-site inspection: a subtle, but critical, anomaly

Upon our arrival, our technician carried out a methodical diagnosis of the outdoor unit installed against a typical Montreal brick wall.
After some operational tests, here are the main findings:

  • Cyclic noise coming from the compressor , suggesting internal wear.

  • Accumulation of debris and dust on the condenser , reducing air circulation.

  • Unstable supply voltage measured on the external circuit breaker.

Upon further analysis, we discovered an oxidized electrical connection at the compressor start relay. This type of fault often causes irregular start-up and a drop in thermal efficiency .

Step-by-step repair: precision and safety above all

To restore optimal operation of the Daikin wall-mounted heat pump , our technician followed a rigorous protocol:

  1. Disconnect the main power supply and secure the workstation.

  2. Cleaning and replacing the start relay with an original Daikin compatible model.

  3. Checking electrical connections and tightening all terminals.

  4. Thorough cleaning of the outdoor condenser using a specialized biodegradable cleaner.

  5. System restart and Inverter compressor calibration to ensure smooth start-up and stable energy consumption.

  6. Final measurement of pressures and temperatures to confirm thermal efficiency meets manufacturer's specifications.

Result: restored efficiency and a satisfied customer

After repair, the heat pump resumed normal operation, with:

  • Optimal energy efficiency ,

  • A stable and uniform interior temperature ,

  • And a reduced noise level both outside and inside.

The customer immediately noticed a difference in the quality of heating and cooling, confirming that the intervention had corrected the root cause of the problem, not just the symptoms.

AirGreen expertise: much more than just a repair

At AirGreen, we view every service call as an opportunity to optimize the overall performance of your HVAC system . In this case, our technician also:

  • Checked the condensate pipe drainage to prevent any risk of stagnant water.

  • Inspected the wall fixings to ensure that no vibrations are transmitted to the structure.

  • Cleaned the electrical protection cover to ensure maximum durability.

These touches, although discreet, guarantee increased longevity of the Daikin system and quiet operation —an essential criterion in urban residences in Montreal.

Professional tips to avoid future breakdowns

Our technicians often remind you of a few simple, but essential, tips to extend the life of a wall-mounted heat pump:

  • Clean the interior filters monthly to maintain optimal airflow.

  • Avoid obstructions around the outdoor unit (plants, objects, snow).

  • Schedule annual preventative maintenance , ideally in the spring, before the peak usage period.

  • Watch for unusual noises or short cycles : these are often the first signs of an underlying problem.

These actions not only help avoid costly repairs, but also maintain stable energy consumption .

AirGreen: the benchmark in heat pump repair in Montreal and its surrounding areas

With hundreds of repairs performed each year on Daikin, Gree, Fujitsu, Panasonic, Trane and Midea systems, our team has comprehensive expertise in residential and commercial HVAC repair .

We serve all of Greater Montreal , including Laval, Longueuil, the North Shore and the South Shore , with fast response times and transparent customer service.

Each AirGreen technician is trained to comply with the electrical and refrigeration safety standards in force in Quebec, ensuring compliant, efficient and durable repairs.

An exemplary repair in Rosemont–La Petite-Patrie

This repair of a Daikin wall-mounted heat pump in Rosemont–La Petite-Patrie perfectly illustrates our commitment: to intervene quickly, diagnose accurately, and restore the comfort of our customers without compromising on quality.

Thanks to our know-how and our rigor, the customer has regained total comfort , with a system as efficient as the first day.