Standard business-hours diagnostic: $99-$149 depending on the equipment (furnace and AC are $99; boiler and heat pump are $149). After-hours emergency diagnostic: $199. If you proceed with the repair, the diagnostic fee is credited against the invoice.
How we diagnose
North York HVAC repair — Real diagnosis, not just parts swapping
The tell-tale sign of a bad HVAC service call is a technician who arrives, listens for 30 seconds, and starts replacing parts one at a time hoping one of them fixes the issue. That approach runs your bill up and often misses the underlying cause. A short in a control board can look like a bad blower motor; a plugged flame sensor can look like a bad ignition module.
Every service call starts with a combustion analysis (for gas equipment) or a refrigerant charge and pressure check (for AC/heat pump), plus an electrical draw check on the affected component. Those three tests point to the actual failed part 80% of the time. The remaining 20% needs deeper diagnostic time — which we quote before running.
If we can't source a discontinued part, we tell you before charging for further diagnostic time and give you the honest 'repair vs replace' conversation with numbers on both paths. Related in North York: heat pump repair and AC installation.
$99-$149
Diagnostic fee
50% of new
Repair vs replace threshold
Same-day
Parts sourced
