Uneven Temperatures in Your Pickering Home? Start Here
One of the most common calls we get from Pickering isn’t “my furnace is dead.” It’s “the upstairs is freezing and the basement is fine,” or the opposite in July. Uneven temperatures are rarely one big problem. It’s usually a few small ones stacked together.

Start with the easy stuff
- Filter: a clogged filter cuts airflow to the whole house, and the rooms at the end of the longest duct runs feel it first.
- Registers and returns: make sure furniture, rugs, or curtains aren’t covering them. Blocked return grilles are just as bad as blocked supplies.
- Fan setting: running the furnace fan on “on” or a circulate mode mixes air between floors and can even things out noticeably.
Balancing dampers
Many homes in Pickering have manual dampers on the trunk lines near the furnace. They often get set once, years ago, and forgotten. Opening the upstairs branches a bit more in summer and the basement branches in winter is an old trick that still works.
Leaky or undersized ductwork
Duct joints in unfinished basements and attics are often unsealed. Air that leaks out before reaching the rooms is heat you paid for. Sealing accessible joints with mastic or foil tape (not cloth duct tape) helps. In some homes the real issue is that the upstairs only has one or two small supply runs, and no amount of balancing fixes that.
Equipment that’s the wrong size
An oversized furnace or AC heats or cools fast, shuts off, and leaves the far rooms behind. A two-stage or variable-speed system runs longer at a lower output, which evens out temperatures much better. When we quote a replacement we do a heat-loss calculation instead of matching the old unit’s size.
Insulation and windows
Sometimes the HVAC system is fine and the room just loses heat faster: a bonus room over a garage, an old window, an attic with settled insulation. Natural Resources Canada has a good overview of home energy upgrades if you want to look into that side.
If you’ve tried the basics and the problem is still there, book a visit and we’ll measure airflow room by room. More on our heating and cooling services, or call 647-657-2977.