As soon as the first frost hits London, ON, the last thing you want is to be caught inside hoping your furnace holds out through winter. A preventive inspection could save you from mid-winter breakdowns, safety risks, and skyrocketing utility bills; so if there are signs your heating system may not be performing as it should then now is the time to act before winter has an opportunity to set in!
HVAC Contractors in London, ON such as Constant Home Comfort provide homeowners across London and Southwestern Ontario with fast diagnostics, repair, and replacement, often same or next day service! Whether your system uses gas, high efficiency boiler technology, or hybrid technology combined with heat pumps, our licensed technicians have you covered to stay warm while controlling costs.
Below are the key indicators that your furnace requires immediate attention and what steps to take next.
1) Unusual Noises such as Banging, Screeching or Rumbling
A working furnace should produce a soft hum. Any new or loud noises indicate potential trouble: banging/booming could mean delayed ignition or expanding ducts; screeching could indicate loose belts or worn motor bearings; rumbling after shutdown could indicate incomplete combustion or burner issues.
Why it Matters: Mechanical strain and ignition problems can shorten your furnace’s lifespan and pose safety concerns, yet an inspection by an experienced technician could identify and rectify them before they turn into more costly repairs.
What to Do: If the sound is severe or persistent, shut down your system immediately and contact Constant Home Comfort London immediately for service. They can inspect burners, belts, motors and the ignition system as well as make on the spot fixes when possible.
2) Short Cycling or Long Run Times
Your furnace should operate in regular cycles. Two patterns indicate problems: Short Cycling and Long Run Times.
Short Cycling: When your furnace turns on and off rapidly without reaching the set temperature, causes may include restricted airflow (due to dirty filters or blocked vents), malfunctioning flame sensors or oversize units.
Long Run Times: Your system appears to be operating, yet fails to reach its thermostat setting. Common causes could include weak blower motors, clogged filters, leaky ductwork or even a failed heat exchanger.
Why it Matters: Inconsistent cycling wastes energy and stresses components. Left unchecked, an irregular cycle could lead to midseason breakdown.
What to Do: Replace the filter, open all supply and return vents, and book a diagnostic. Our technicians measure airflow, examine flame sensors, inducer motors, size/duct integrity evaluations as well as airflow measurements.
3) Hot and Cold Spots in Your House
Uneven heating can be more than an inconvenience: it often points to furnace or duct issues. Rooms located farthest away may feel cold while those closer to the furnace heat up quickly. Closed or blocked vents restrict airflow; leaky ducts lose heat before reaching rooms; and weak blower motors cannot effectively distribute warm air throughout your home.
Why It Matters: Your system is working harder than necessary, increasing wear and energy costs as it tries to produce uneven results.
What to Do: First ensure the vents are unobstructed and unblocked before replacing the filter. If issues still arise, we can pressure test ducts, balance them better or recommend zoning or blower upgrades as appropriate.
Unusual Energy Bill Spikes: If your gas or hydro bill increases without an explanation for that increase, efficiency may have decreased:
Filthy burners and clogged filters force furnaces to work harder than necessary, while worn igniters, weak sensors, or an aged heat exchanger reduce performance further. As equipment ages it becomes less efficient.
Why it Matters: Efficiency decreases often precede equipment failure, so identifying any minor issues early is key to keeping costs manageable and prolonging equipment lifespan.
What to Do: Schedule a tune up. Constant Home Comfort London will clean burners, verify combustion, check gas pressure, calibrate thermostat and inspect heat exchanger and venting systems to make recommendations on repairs vs replacement as well as high efficiency options that could significantly lower heating costs.
4) Yellow Burner Flame or Soot Near Vents
Your furnace’s burner flame should be steady and blue. A yellow or flickering flame could indicate incomplete combustion due to an issue with its combustion chamber or lack of oxygen, while soot on registers or access panels could indicate other issues as well.
Why It Matters: Incomplete combustion can produce carbon monoxide (CO), an odourless and potentially lethal gas that should be considered an important health and safety priority.
What to Do: If you suspect combustion issues, shut off and call for service as soon as possible. Install or test CO detectors on all levels of your home, particularly near bedrooms as soon as possible. Our technicians will then inspect burners, verify combustion, inspect heat exchangers and exhaust venting before suggesting possible solutions.
5) Frequent Thermostat Adjustments
Are You Regulating the Thermostat to Stay Comfortable? Do You Keep Tweaking the Thermostat for Comfort? In that case, perhaps the problem lies elsewhere, like with other parts of your HVAC system:
- Poor calibration or placement (for instance near drafts or direct sunlight)
- Short cycling caused by airflow/ignition issues
- Reduced furnace output due to failing component
Why it Matters: Adjustments often mask underlying issues while increasing energy usage.
What to Do: Our technicians can calibrate or relocate your thermostat, ensure proper wiring is in place, and monitor the system’s temperature rise to ensure the furnace produces and moves adequate amounts of heat.
6) Dust, Dryness or Decreased Air Quality
More dust, dryer air or frequent allergy symptoms can indicate HVAC issues. Clogged filters and blowers recirculate particulates while leaky ducts draw in unfiltered air from basements, crawl spaces or attics; an undersized or outdated furnace could make matters worse.
Why it Matters: Poor air quality negatively impacts both comfort and health, placing strain on both individuals and systems alike.
What to Do: It is recommended that filters be changed prior to heating season and, where feasible, upgraded with higher MERV ratings for better air quality. Constant Home Comfort London can install whole home humidifiers, upgrade filtration, seal ducts and clean key furnace components for enhanced indoor air quality.
7) Pooled Water Around the Furnace
High-efficiency furnaces (condensation models) produce condensate that should drain off through an appropriate condensate line and pump. Any pooling water may indicate trouble.
Why it Matters: Water damage to a furnace cabinet and electrical components could indicate major internal failure in extreme cases. A blocked condensate trap or line, broken pump, improper venting or cracking heat exchanger (rare but serious) are among many possible culprits that could contribute to its presence, while improper venting or improper ventilation (rare but serious) also warrant further investigation. Eventually, it could even compromise ventilation. Regardless, failure could wreak havoc.
What to Do: Shut off power to your unit and contact our service department immediately. We’ll clear out your drain, test the pump, inspect your exchanger/venting unit and clear out your drain as part of our inspection service.
8) Older Furnace with Rising Repair Costs
A well-maintained furnace should last 12-20 years when properly maintained; if yours is over 15 years old and requires multiple repairs in recent seasons, it may be time for an upgrade or replacement.
Repair costs add up quickly, while older systems run less efficiently. A modern high efficiency furnace paired with a smart thermostat can drastically lower winter bills; rebates and financing programs make upgrading affordable.
Why it Matters: Planning ahead can prevent an unexpected heat emergency on one of the coldest days of the year.
What to Do: Contact Constant Home Comfort London and request a no commitment assessment. They offer various makes and models as well as transparent quotes with available incentives.
9) Burning Smells or Persistent Odours
Normal operating procedure calls for heaters to emit a mild dusty scent when first powered on, which should quickly dissipate over the course of several hours; strong or persistent odours are not. Electrical or burning plastic smells could indicate overheated components or wiring issues; metallic/chemical odours could indicate motor problems or overheated bearings; persistent musty smells might signal moisture buildup in ducts or an ineffective condensate system.
What to Do: If odours persist, turn off your system and contact our service team immediately for service. Our specialists can assess motors, wiring and components while cleaning components to address moisture issues and any associated moisture-related problems.
Avoid waiting until winter has set in; set up an inspection now if your furnace makes strange noises, heats unevenly, runs for longer than usual or drives up energy bills. Constant Home Comfort London is your go-to reliable HVAC contractors in London, ON, who specialize in repairs, tune-ups and more. Contact them now if these symptoms apply to you! Stay warm, safe and productive by scheduling your furnace inspection now.