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Technician performing preventative maintenance

Invest in Preventative Maintenance for Your Business

The primary goal of preventative maintenance is to avoid or mitigate the consequences of equipment failure, usually by preventing the failure before it actually occurs. Our preventative maintenance program is designed to preserve and restore equipment reliability by replacing worn components before they actually fail. Our program allows technicians to record equipment deterioration so they can inform you of the cost of replacing/repairing worn parts before they cause system failure. Our goal is to keep equipment working and/or to extend the life of the equipment.


Essentially, what a service agreement will do for you is:

  • Improve occupant comfort
  • Improve unit efficiency
  • Help prevent system failure
  • Reduce wear on system
  • Help identify potential system problems before they occur
  • Lower energy bills
  • Maximize efficiency and capacity of the equipment


Archie Johnstone Plumbing & Heating’s certified technicians will check, where applicable, the following:

  • Operating pressures
  • Refrigerant charges
  • Filter condition/change filters/clean filters
  • Compressors
  • All motors, indoor/outdoor
  • Electrical connections
  • Belts, sheaves and bearings
  • Both evaporator and condenser coil condition
  • Heat exchanger condition
  • Manifold gas pressure
  • Limit switches
  • Ventor motors
  • Condition of burners
  • Thermostat operation
  • Boiler tubes and fins

After inspection, AJPH will provide you with a comprehensive report, which allows for budget forecasting. Upon request, we will provide an equipment audit.


Contact us today to schedule preventative maintenance of your commercial mechanical systems.


Archie Johnstone Plumbing & Heating services, maintains and installs all of the following:

  • Packaged rooftop units
  • Heat pumps
  • Chillers
  • Boilers
  • On-demand (tankless) hot water tanks
  • Hot water tanks (domestic and commercial)
  • Ductless split systems
  • Natural gas furnaces
  • Electric furnaces
  • Walk-in coolers/freezers
  • Ice machines
  • Reach-in coolers
  • Unit heaters
  • Fan coils
  • Heat/energy recovery units
  • Variable refrigerant volume/flow systems
  • Dust collectors
  • Boiler and chiller chemical treatment

Service Areas

  • Victoria
  • Duncan
  • Cowichan Valley
  • Ladysmith
  • Nanaimo
  • Qualicum
  • Courtenay
  • Campbell River
  • Comox Valley
  • Port Alberni
  • Vancouver Island
  • Protection Island
  • Port Hardy
  • Gabriola Island
  • Ucluelet
  • Tofino
  • Salt Spring Island
  • West Shore
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