An aging device, but still capable of performing well
At AirGreen , we believe that proper maintenance and well-executed repairs can add years of life to a wall-mounted air conditioner. This is exactly what we demonstrated during this recent service call in Sainte-Thérèse , on Montreal's North Shore , where a customer contacted us about an early-generation Gree wall-mounted air conditioner installed in an open-concept space connecting the kitchen and living room.
The unit, with its beige design typical of models from the 2000s, exhibited very poor cooling despite a compressor that appeared to be functioning properly. The customer also noticed an irregular noise coming from inside the case, accompanied by a damp smell when turning on the system.
Complete wall system diagnosis
After securing access with a ladder and removing the unit's front panel, our technician carried out a methodical inspection of the main components:
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Air filters completely clogged with dust and kitchen grease.
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Dirty evaporator coil , drastically reducing heat exchange.
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Fan motor with slight mechanical play.
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Electronic card with some connectors showing traces of oxidation.
The outdoor condenser, meanwhile, was showing correct pressures—a good sign that the refrigeration circuit and compressor were still in good condition.
Gree Wall Mounted Air Conditioner Repair Steps
1. Disassembly and complete cleaning
We began by partially disassembling the unit's housing to access the coil and drum fan. The entire assembly was thoroughly cleaned using a specialized biodegradable product designed for HVAC systems.
The fan motor , after light lubrication and realignment of its shaft, returned to silent operation.
2. Rehabilitation of the condensate drain
The drain pipe was partially clogged, which explained the damp smell the customer noticed. After flushing with compressed air and diluted peroxide , the pipe was reconditioned, eliminating any risk of water backup.
3. Electronic repair
We then proceeded to clean the oxidized connectors on the electronic board and check the supply voltages. A weakened solder on the fan control relay was redone to ensure stable contact.
4. Performance Test
Once the unit was closed, we restarted the system and measured the blowing temperature: 9.4°C at the outlet , compared to 18°C before intervention. An efficiency almost doubled.
Results achieved and customer satisfaction
The Gree wall-mounted air conditioner has returned to optimal operation, effectively cooling the entire living room and kitchen area. The noise level has dropped by 40% , and the unpleasant odor has completely disappeared.
The customer, pleased to see his original device come back to life, decided to schedule annual preventative maintenance with AirGreen to prevent any further accumulation of dirt or moisture.
The benefits of maintaining older Gree models
Older Gree systems are renowned for their mechanical robustness and durability, provided they receive regular maintenance. Even though they don't use the latest R-32 refrigerants, their energy efficiency remains acceptable after proper refurbishment.
However, we advise our clients to:
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Clean filters every 4 to 6 weeks .
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Avoid prolonged use in “Dry” mode , which can cause dust to build up on the fins.
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Schedule annual professional maintenance , including internal coil cleaning and refrigerant check.
AirGreen, your reference for HVAC repairs on the North Shore
Whether your unit is a recent model or an older Gree wall-mounted air conditioner , our qualified technicians have the expertise and equipment to get it back up and running quickly and safely.
We operate throughout Montreal, Laval, Longueuil, on the North Shore and the South Shore , with a constant concern for transparency, sustainability and efficiency.
Do like this customer from Sainte-Thérèse: entrust your HVAC system repair needs to AirGreen , and enjoy renewed comfort, summer and winter.