Furnace and AC questions for Welland homeowners, answered.
The same handful of questions come up most often from Welland homeowners. Here are the plain-language answers, the kind you deserve before any work starts.
Common HVAC questions in Welland
These answers are general guidance based on publicly available Ontario information. Confirm specifics with a licensed HVAC contractor and check official program pages for current rebate details.
Why is my furnace running but not blowing hot air?
Usually one of three things: a thermostat set to ON instead of AUTO so the fan runs without a heat call, a clogged filter that tripped the high-limit switch, or a furnace locked out after a failed ignition. Check the filter and fan setting first. If the burners still will not light, that is a service call because it involves the gas valve.
My AC runs but the house will not cool. What is wrong?
The two most common summer causes are choked airflow from a dirty filter or coil, and low refrigerant from a slow leak. A frozen coil will also stop the cooling while the unit looks fine. Shut it off, let any ice melt, change the filter, and if it still will not cool, book a diagnostic. The full troubleshooting checklist is on the AC heat-wave guide.
How much should furnace or AC repair cost in Welland?
Most common repairs in Ontario land between $150 and $650 in parts and labour. A diagnostic visit is typically $90 to $150 and is often credited to the repair if you proceed. A full furnace replacement typically runs $3,000 to $8,500 installed, a heat pump higher, before rebates. See the full cost guide.
What HVAC rebates are available in Ontario in 2026?
The Ontario Home Renovation Savings Program (delivered by Save on Energy and Enbridge Gas) is active as of 2026 for qualifying heat-pump and efficiency upgrades. Rebate amounts and eligibility requirements change, so confirm current details on the official Home Renovation Savings program page before committing to any purchase. Do not rely on a verbal description from a contractor as the final word on rebate amounts.
Should I repair or replace my furnace?
A rough guide: if the repair cost is more than half the cost of a comparable new unit and the furnace is past fifteen years, replacement usually wins on economics. Under that threshold, a repair is often the better call. Ask any contractor to show you the repair-versus-replace math in writing before you decide, rather than defaulting to a sale.
How do I avoid getting overcharged on a furnace repair?
Ask for the diagnosis in plain terms and the part name before you approve anything, and get the repair price in writing. Be cautious if a cracked heat exchanger gets called the moment someone walks in, with no combustion test to back it up. A heat exchanger diagnosis requires a combustion analysis to be credible. A second opinion on any expensive diagnosis costs far less than a furnace you did not need.
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