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🍁 Built for Canadian homes — written to Canadian codes and provincial rules. Not intended for use outside Canada.
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One room won't heat (electric baseboard)

A single cold room is usually a small, local problem — a bumped thermostat or a tripped breaker — not your whole heating system failing.

tuneWhat are you noticing?
Select anything that matches and the checklist below reorders to fit. Not sure? Skip it.
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Start here

In Canadian homes, check the thermostat first. Turn it well up and wait a few minutes — a bumped dial or a programmable setback is the single most common reason one baseboard room goes cold, and it costs nothing to rule out. Listen for the faint tick of the heater coming on.

Ranked from real-world failure data. The order updates as you select what you’re noticing above.

Likely causes, in the order to check them

Showing the typical order
Beginner-friendly Doable, with care Safety-critical Call a pro

visibilityHow to check

report This is a live 240-volt circuitBaseboard thermostats switch the full 240 volts, and both wires stay live even with the dial "off" — only the breaker truly de-energizes it. Kill the breaker before you open the thermostat, verify it's dead, and if testing a live circuit isn't something you're set up to do safely, this is a fast, inexpensive job for a licensed electrician.
  1. Turn OFF the breaker for that circuit before removing the thermostat cover — a line-voltage thermostat carries the full 240 volts.
  2. With power off, confirm the wiring is intact and undamaged, then restore power and set a multimeter to test for voltage passing through when the dial is turned up.
  3. No voltage out to the heater with the dial fully up, and power confirmed in, points to a failed thermostat.
buildmultimeterbuildscrewdriver schedule20 min

handymanHow to fix it

With the breaker off and verified dead, photograph the wiring, remove the old line-voltage thermostat, and wire in a matching 240-volt (double-pole) replacement rated for the heater's wattage — line to line, load to load.

  1. Switch the breaker OFF and confirm the heater is dead with a voltage tester at the thermostat before touching any wire.
  2. Photograph the existing connections, then release the wires from the old thermostat.
  3. Match the new thermostat to the heater's voltage and wattage and to the wiring type (double-pole for 240 V). Connect line-to-line and load-to-load per its diagram.
  4. Reinstall the cover, restore power, and confirm the heater warms when the dial is turned up.
schedule40 min savings$20–45
Line-voltage (240 V) baseboard thermostatMatch double-pole vs single-pole and the heater's total wattage rating
gavel Check your province first AB: homeowner may do this · BC: homeowner may do this · ON: permit + inspection required · PE: homeowner may do this · QC: licensed professionals only
Like-for-like replacement of a line-voltage thermostat is generally owner-permitted; confirm the provincial rule.

verifiedWhy this one goes to a pro

Overheated, discoloured, or scorched wiring at a 240-volt heater means the connection has been failing under load. Repairing it safely means finding why it overheated, not just re-tightening it. Leave the circuit off and have a licensed electrician make the repair.

Your notes travel with the request — what you saw, what you ruled out, when it started — so the pro arrives with a head start instead of a mystery.

sort

Why the list is in this order

We don’t sort by likelihood alone. We sort the way a good, honest tradesperson thinks: rule out the free, safe, common causes first. That’s why the cheap checks outrank the expensive repairs — and why anything dangerous gets a hard stop instead of a pep talk. The order exists to save you money, not to sell you anything.