Servicing the Ottawa region’s Heating & Cooling Needs for 25 Years.

HVAC Troubleshooting

Standard HVAC Troubleshooting

While HVAC troubleshooting can be helpful in some cases, there are more dangerous scenarios in which you should shut your system down.

 Turn your system to OFF (at the thermostat) if:

  1. You hear loud metal on metal grinding.
  2. You smell a burning odour.

My Heating System Isn’t Working

When your furnace breaks down, most people’s initial reaction is to call a technician. To make sure it’s not a less serious issue and to potentially save money, make sure to go over this HVAC troubleshooting list before calling:

  1. Thermostat is set to heat – It can be as simple as flipping a switch on your thermostat. If it’s on cool or off, your heating system won’t work.
  2. New batteries in your thermostat – If your batteries are more than a year old, they should be replaced.
  3. Make sure the furnace fuse or breaker is on – Check if your breaker switch has been tripped or if a fuse has blown.
  4. Furnace switch is on – Your furnace pushes the warm air throughout your home and if this switch that can often look like a light switch is turned off, it won’t work.
  5. New furnace filter – If your filter is more than a few months old, there’s a chance it is restricting airflow and causing your system to shut down.
  6. Clear all snow from any vent terminations – Some furnaces – especially newer, high efficiency furnaces – have exhaust and intake pipes connected to an exterior wall. Make sure there is no snow clogging it.
  7. Ensure that furnace access panels are fully re-installed after filter replacements  There is a safety switch that if not properly engaged, will prevent equipment from operating properly.
  8. Check for obstructed airflow –This is sometimes caused by relocating furniture in your home, (which can block air circulation grills), registers located around the perimeter of your home being closed or a plugged air filter.

My Cooling System Isn’t Working

At times, what may seem like a big problem can have a simple solution. Make sure you go over this HVAC Troubleshooting list before calling a Harding technician to avoid any unnecessary costs:

Things to check inside your home:

  1. Thermostat is set to cool – It can be as simple as flipping a switch on your thermostat. If it’s on heat or off, your cooling system won’t work.
  2. New batteries in your thermostat – If your batteries are more than a year old, they should be replaced.
  3. Furnace switch is on –Your furnace pushes the cool air throughout your home and if this switch that can often look like a light switch is turned off it won’t work.
  4. New furnace filter – If your filter is more than a few months old, there’s a chance it is restricting airflow and causing your system to shut down.
  5. Breaker in breaker panel turned on – Check if your breaker switch (normally marked AC) has been tripped or if a fuse has blown.
  6. Water leaking around the furnace – Your unit may be frozen and needs to be shut off for 24 hours before calling a technician.
  7. Ice on pipes in basement – Unit should be thawed for 24-48 hours before any technician can do a proper diagnosis.

Things to check outside your home:

  1. Is the cover removed from the unit – If the cover is left on or if there is debris covering the system, it could restrict airflow and cause it to shutdown.
  2. Check grey disconnect box on outside wall – Check to see if breaker in box is set to on.
  3. Is there ice on outside unit or pipes inside – Unit should be thawed for 24-48 hours before any technician can do a proper diagnosis.
  4. Dirty or clogged fins on unit – Disconnect the power and rinse your system with a no-nozzle water hose. If you experience any problems while cleaning your system, please call a Team Harding technician.
  5. It must be 18 °C to diagnose system properly – Keep this in mind when calling a technician.

If you’ve gone over every step on the HVAC troubleshooting list and your system is still down, it’s time to call a professional. Team Harding technicians are always experienced, bonded, factory trained and licensed. We will install and service your equipment with incomparable professionalism. When working with gas appliances, always make sure that your system is being serviced by a licensed gas fitter.

If you smell or suspect a gas leak – please call Enbridge at 1-866-763-5427.

Click here to book a service appointment or if you are in need of emergency service, give us a call at (613) 831-2257.

Disclaimer: Do not attempt any troubleshooting or maintenance work yourself if you are uncomfortable or unfamiliar with proper procedures, as you could be exposed to potentially life threatening levels of electrical power, sharp metal edges, and rotating mechanical devices, which could cause personal injury.

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