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Réparation d’un climatiseur mural Comfortmaker au Plateau-Mont-Royal
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Repair of a Comfortmaker wall-mounted air conditioner in Plateau-Mont-Royal

A typical service call in a downtown Montreal condo

When a Comfortmaker wall-mounted air conditioner shows signs of fatigue in the heart of a Montreal summer, indoor comfort can quickly suffer. This is precisely what happened to a customer in Plateau-Mont-Royal , who contacted us after noticing that his unit was no longer producing cold air and was making an unusual noise every time it started up .

This type of air conditioner, typical of urban condos and apartments, is often used intensively during the summer months. After a few years without thorough maintenance, dust, vibrations and temperature fluctuations can lead to mechanical or refrigeration problems .

First assessment and technical diagnosis

Upon arrival, we performed a complete system diagnostic . The Comfortmaker wall unit, installed above a sofa in a bright living room, displayed several telltale signs:

  • Clogged air filter , which restricted airflow and strained the compressor;

  • Accumulation of dust on the evaporator , causing fouling of the coil and inefficient heat exchange;

  • Condensates poorly evacuated , causing intermittent water flows through the facade;

  • And a clicking noise when starting, often symptomatic of an unbalanced blower motor .

These combined elements indicated a lack of regular maintenance and gradual wear of certain internal components.

The repair steps carried out by AirGreen

Our technicians always follow a structured protocol to ensure optimal HVAC system repair. Here are the main steps of this intervention:

  1. Complete removal and cleaning of the air filter , using an environmentally friendly certified antibacterial product.

  2. Dusting and steam cleaning of the evaporator , to restore heat transfer efficiency.

  3. Inspection of the condensate tray and drainage pump , with unblocking of the drain line to prevent any water backflow.

  4. Blower motor rotation test : disassembly, cleaning of the propeller and lubrication of the central axis.

  5. Electrical check of control boards and internal connectors for any traces of oxidation.

  6. Measurement of refrigeration pressures and control of the thermal cycle using a digital pressure gauge.

The final diagnosis confirmed that the compressor and refrigerant charge were in good condition , but that a mechanical imbalance in the fan was causing the reported noise.

So we replaced the blower motor with an original Comfortmaker part and reinstalled the front panel after a thorough cleaning.

Result: restored performance and absolute silence

Once the repair was completed, post-intervention measurements showed a blown air temperature of 9°C at the outlet and a stable suction temperature of 24°C , proof of excellent performance.

The customer immediately noticed:

  • Fast and even cooling of the room;

  • Quiet operation ;

  • And above all, the lack of water flow on the wall, a common problem with poor drainage.

We recommended annual maintenance in the spring , to prevent the filters and coils from getting clogged again.

Why maintain a Comfortmaker wall-mounted air conditioner every year?

Although Comfortmaker wall units are renowned for their reliability, their performance depends heavily on maintenance. A poorly maintained system can:

  • Lose up to 25% of its energy efficiency ;

  • Accumulate dust and allergens that are harmful to indoor air quality;

  • Suffer electrical overloads ;

  • And increase energy consumption unnecessarily.

At AirGreen , we offer customized HVAC maintenance plans tailored to each type of unit—from mini-split units to multi-zone central systems —to prevent these inconveniences and extend the life of your units.

AirGreen expertise serving the Plateau-Mont-Royal

This intervention in a condo in Plateau-Mont-Royal demonstrates once again the importance of a meticulous diagnosis and careful intervention . Our technicians, certified RBQ and CMMTQ , are fully versed in the specificities of Comfortmaker, Fujitsu, Sharp, Gree, Midea and Goodman units, often found in residential buildings in Montreal.

We operate every day throughout Greater Montreal— Montreal, Laval, Longueuil, the North Shore and the South Shore —with a single goal: to restore your comfort quickly, sustainably and without surprises.