A typical Montreal service call: diagnosis and restart of an old Sanyo system
At AirGreen , we frequently receive calls for Sanyo wall-mounted air conditioners , particularly in older residential areas like Ville Mont-Royal , where many systems installed more than ten years ago still provide reliable service… until a breakdown occurs.
This is exactly the case of our client, owner of a red brick duplex, whose Sanyo outdoor compressor suddenly refused to start when the first warm days arrived.
The context of the intervention
The outdoor unit, mounted on a brick wall about a meter above the ground, was making a clicking noise without the fan turning on . The customer had tried to reset the circuit breaker, but nothing worked: there was no sign of life from the compressor .
It was a Sanyo wall-mounted model with approximately 12,000 BTUs, installed over 12 years ago. These units, while robust, become susceptible to corrosion and internal electrical problems over time.
Diagnosis: AirGreen method in the field
Our technicians carried out a complete diagnosis of the electrical and refrigeration circuit :
-
Checking the supply voltage : the voltage was stable at 240 V, which eliminated any anomalies on the line side.
-
Inspection of the relay and control board : the board showed traces of oxidation, probably caused by the typical Montreal freeze/thaw cycles.
-
Fan motor continuity test : The motor was functional, but the compressor start relay was no longer responding.
-
Inspection of the coil and refrigeration connections : no apparent leaks or excessive ice accumulation.
The final diagnosis: defective compressor relay , requiring immediate replacement.
Repair: efficiency and safety above all
After confirming the fault, our certified technician proceeded to replace the starter relay , then to a complete cleaning of the control box with compressed air and dielectric cleaner.
Once the connections were tightened and protected, we restarted the system:
The compressor started running smoothly again without any abnormal noise .
We then carried out:
-
a check of the refrigerant pressure (R-410A) to ensure that the thermodynamic cycle was balanced;
-
a measurement of the indoor/outdoor temperature differential to validate performance;
-
a start-up current control , completely within the standards for a system of this age.
Result: comfort restored and advice to extend lifespan
Within an hour and a half, the Sanyo system was back up and running.
We advised the owner:
-
to have the filters and coils cleaned twice a season;
-
to plan annual preventive maintenance to avoid electrical failures due to humidity;
-
to consider, in the medium term, a replacement with a more efficient wall-mounted heat pump (for example a Gree Vireo+ or Midea R32 model) which would offer superior energy efficiency and a reduction in electricity consumption of almost 30%.
Why choose AirGreen for your Sanyo system repair?
Our teams are trained on older systems like Sanyo, Panasonic, Fujitsu and Mitsubishi , and have the expertise to extend their lifespan without compromising safety or energy efficiency.
Each AirGreen intervention is based on:
-
an accurate and transparent diagnosis ;
-
original or certified equivalent parts ;
-
a guarantee on the work carried out ;
-
rapid availability in Montreal, Laval, Longueuil, North Shore and South Shore.
A conclusion that illustrates our mission well
This Sanyo wall-mounted air conditioner repair service in Ville Mont-Royal perfectly illustrates our commitment: to bring proven systems back to life while advising our customers on sustainable and efficient solutions.
At AirGreen , every service call is an opportunity to combine technical expertise and human quality — so that our customers' comfort remains constant, no matter the season.
SEO keywords : Sanyo air conditioner repair, wall-mounted air conditioner maintenance Montreal, HVAC technician Ville Mont-Royal, air conditioning troubleshooting North Shore, AirGreen HVAC service.