A properly functioning garbage disposal is a modern kitchen convenience, making meal prep and cleanup significantly easier. But when it acts up – whether it’s humming ominously, refusing to turn on, leaking water, or struggling to grind – it quickly becomes a source of frustration. For homeowners and tenants across Toronto and the Greater Toronto Area (GTA), understanding common garbage disposal issues and how to address them can save time, stress, and potentially money. At Everyday Repair, we’re committed to helping you keep your household running smoothly. While garbage disposals can be tricky, many issues have straightforward causes.
This guide will help you diagnose frequent problems and understand when a professional technician is needed.
Understanding Your Garbage Disposal (Safely!)
Before diving into troubleshooting, it’s crucial to understand the basics. A garbage disposal unit uses a spinning impeller plate to push food waste against a stationary grind ring.
The food is then broken down into tiny particles that can be safely flushed down the drain. The most critical step before attempting any troubleshooting or repair is safety.
Always, always, turn off the power to the garbage disposal at the electrical panel (breaker box) or wall switch BEFORE putting your hand or any object inside the unit.
Common Garbage Disposal Problems & How to Address Them
Here’s a look at frequent issues and what they typically mean:
1. Humming But Not Grinding (Jammed)
Cause: This is usually caused by a foreign object or dense food stuck between the impeller plate and the grind ring, preventing the motor from spinning freely.
Diagnosis: You hear the motor humming or buzzing when you turn on the switch, but the grinding mechanism isn’t rotating, and the unit is likely hot.
Safe DIY Fix:
- Turn off power at the breaker/switch.
- Shine a flashlight down the drain opening to look for the obstruction. NEVER use your hand.
- If you see an object (like a bone, fruit pit, or silverware), use pliers or tongs to carefully remove it.
- If no object is visible, try inserting a ¼-inch hex key (Allen wrench) into the centre hole at the bottom of the disposal unit. Rotate the wrench back and forth several times to manually turn the motor shaft and dislodge anything stuck.
- Remove the hex key. Wait a few minutes for the motor to cool.
- Turn the power back on at the breaker/switch.
- Press the red reset button located on the bottom of the disposal unit.
- Turn on the cold water, then flip the disposal switch.
When to Call a Professional:
If you cannot locate or safely remove the object, if the hex key doesn’t turn freely, or if the unit still hums (or makes no sound) after pressing the reset button.
2. Not Turning On
Cause: This could be a tripped internal thermal overload switch (common after a jam), a tripped circuit breaker, a faulty wall switch, or a serious electrical or motor issue.
Diagnosis: You flip the switch, but absolutely nothing happens – no sound, no humming.
Safe DIY Fix:
- Ensure the disposal is properly plugged into the wall outlet (if applicable).
- Check your home’s electrical panel (breaker box) for a tripped breaker. Flip it completely off, then back on.
- Locate the small red reset button on the bottom of the disposal unit. Wait a few minutes for the motor to cool, then firmly press the button. It might click or stay in if it was tripped.
- Turn on the cold water, then flip the disposal switch.
When to Call a Professional:
If the unit still won’t turn on after checking the breaker, plug, and pressing the reset button. This could indicate a more complex electrical problem or motor failure requiring expert diagnosis.
3. Leaking Water
Cause: Leaks typically occur at connection points or due to a crack in the unit’s housing. Common leak points include the sink flange where the disposal connects to the sink drain, the dishwasher hose connection, or the drainpipe connections.
Diagnosis: Water is dripping from the bottom or sides of the disposal unit, or from the pipes leading away from it, usually noticeable when running water or the disposal.
Safe DIY Fix:
- Turn off power at the breaker/switch.
- Place a bucket underneath the disposal to catch drips.
- Inspect all connection points: the mounting bolts connecting the unit to the sink flange, the hose clamp on the dishwasher inlet, and the slip nuts on the drainpipe connections.
- Try tightening any loose mounting bolts (use a wrench) or slip nuts (hand-tighten, then a quarter turn with pliers if needed, being careful not to overtighten plastic parts).
- Check the rubber gasket seals at connections for signs of wear.
When to Call a Professional:
If the leak persists after tightening connections, if the leak appears to be coming directly from the body of the unit itself (indicating a cracked housing), or if you cannot identify the source of the leak.
Cracked housing means the unit likely needs replacement.
4. Clogged / Slow Draining
Cause: This often results from putting prohibited items into the disposal (grease, fibrous vegetables, pasta, rice) or feeding too much material at once.
Diagnosis: Water backs up in the sink, or the drain is slow to empty even when the disposal is running.
Safe DIY Fix:
Turn off power at the breaker/switch.
- Check the drain opening with a flashlight and pliers/tongs (NEVER hands) for any visible large blockages. Remove anything you find.
- Try using a plunger designed for sinks (one without a bell-shaped cup). Ensure the other drain opening (if you have a double sink) is sealed. Fill the sink with a few inches of water and plunge vigorously. Ensure the power is OFF before plunging, as the backpressure could be dangerous if the unit were to accidentally turn on.
- For minor clogs/odors, try running cold water while grinding ice cubes and a cup of rock salt. The ice helps loosen debris, and the salt acts as an abrasive.
When to Call a Professional:
If the clog cannot be cleared with basic methods, if the sink still drains slowly after trying fixes, or if you suspect the blockage is further down the drainpipe beyond the disposal unit.
5. Foul Odors
Cause: Food particles accumulating inside the grinding chamber or drainpipe, allowing bacteria to grow.
Diagnosis: An unpleasant smell emanating from the sink drain or disposal unit, even when not in use.
Safe DIY Fix:
- Grind ice cubes and a cup of rock salt while running cold water.
- Grind citrus peels (lemon, lime, orange) with cold water for a fresh scent.
- Pour half a cup of baking soda into the drain, followed by a cup of white vinegar. Let it fizz for 10-15 minutes, then flush with cold water.
- Ensure you are running enough cold water after using the disposal to flush all particles away.
When to Call a Professional:
If odors persist despite thorough cleaning efforts, it might indicate a larger issue like a partial clog further down the drainpipe that needs professional clearing.
6. Unusual Grinding or Loud Noises
Cause: Often a foreign object (like a coin or piece of cutlery) has accidentally fallen into the grinding chamber. It could also indicate worn grinding components or a motor issue.
Diagnosis: The disposal makes loud scraping, rattling, or high-pitched noises when in use, different from its normal operating sound.
Safe DIY Fix:
- Turn off power immediately at the breaker/switch.
- Shine a flashlight down the drain and carefully look for any visible objects. Use pliers or tongs to remove anything you find. DO NOT use your hand.
When to Call a Professional:
If you cannot locate or safely remove the object, or if the noise persists after you believe you’ve removed any obstruction.
Worn components or motor problems require professional inspection and repair or replacement.
Garbage Disposal Legality in Toronto & GTA
An important consideration for residents in the area is the legality of garbage disposals.
The installation of garbage disposals is prohibited in the City of Toronto due to concerns about the impact of food waste on the municipal sewer system.
Many other municipalities in the GTA also have restrictions or strongly discourage their use.
However, if you live in an older home within Toronto that already has a garbage disposal unit installed, its continued use is generally permitted under a “grandfather clause.”
Repairing an existing unit is typically allowed. The issue arises when considering replacing an old unit with a new one, which might be considered a new installation, and therefore, fall under the prohibition depending on specific local bylaws and the scope of work.
For residents in other GTA regions (Halton, Peel, York, Durham), it’s advisable to check your specific municipal bylaws regarding garbage disposal installation.
Repair services for existing units are widely available across the GTA.
Repair vs. Replacement: Making the Right Choice in Toronto & GTA
Deciding whether to repair your current garbage disposal or replace it depends on several factors:
- Age of the Unit: Garbage disposals typically last 8 to 15 years. If your unit is nearing or past this age range and experiencing issues, replacement is often more cost-effective in the long run.
- Type of Problem: Simple jams or minor electrical resets are often repairable. However, leaks from a cracked housing, significant motor problems, or frequent, recurring issues usually point towards the need for replacement.
- Cost: Consider the cost of the repair versus the cost of a new unit plus installation. In Toronto and the GTA, minor repairs might cost $150-$300, while replacing a unit can range from $400 to $800 or more, depending on the model and complexity of the installation (keeping in mind the legality mentioned above). If the repair cost is approaching half the cost of a new, comparable unit, replacement is often the smarter investment.
If your unit is old, requires frequent repairs, or has a major issue like a cracked housing or motor failure, replacing it is usually the more reliable and cost-effective solution over time, assuming installation is permitted in your specific location.
Preventative Maintenance Tips for Toronto & GTA Homes
Taking simple steps can help prevent most garbage disposal problems:
- Know What NOT to Grind: Avoid grease, oil, fat, fibrous vegetables (celery, corn husks, artichokes), fruit pits, bones, pasta, rice (they expand), coffee grounds, egg shells (can create gritty buildup), and harsh chemicals.
- Use Plenty of Cold Water: Always run cold water before, during, and for 15-30 seconds after using the disposal. This helps flush waste completely through the drainpipes.
- Grind in Small Batches: Don’t overload the disposal. Feed waste gradually.
- Regular Cleaning: Use the ice and salt or citrus peel methods periodically to clean the chamber and remove minor buildup and odors.
- Run It Regularly: Even if you don’t use it daily, run the disposal briefly with cold water every so often to keep parts moving and prevent rust/corrosion.
Conclusion
Dealing with a faulty garbage disposal can be disruptive, but understanding the common issues and knowing safe troubleshooting steps empowers you to address minor problems. Remember to always prioritize safety by turning off the power before inspection or attempting fixes. For issues that persist, seem complex, involve leaks from the unit itself, or point towards motor failure, it’s time to call in a professional. Attempting extensive DIY repairs on electrical appliances connected to plumbing can be hazardous if you lack the proper expertise. If you’re in Toronto or the Greater Toronto Area and facing a stubborn garbage disposal problem, don’t hesitate to reach out.
Everyday Repair’s team of insured technicians has the experience to quickly diagnose and reliably repair or replace your garbage disposal (adhering to local bylaws), restoring convenience to your kitchen with integrity and transparent service.
FAQs About Garbage Disposal Problems in Toronto & GTA
Q: Is it worth it to repair a garbage disposal?
A: It depends on the age of the unit and the nature of the problem. Minor issues like jams or resetting a tripped breaker are worth addressing. However, if the unit is old (nearing or past its 8-15 year lifespan) or has major issues like a cracked housing or motor problems, replacement is usually the more economical long-term solution, provided installation is permitted in your municipality.
Q: What is the average lifespan of a garbage disposal?
A: The typical lifespan of a garbage disposal unit is between 8 and 15 years, depending on the model, usage frequency, and how well it’s maintained.
Q: Why is my garbage disposal humming but not turning?
A: This is almost always caused by a jam. Something is stuck between the grinding components, preventing the motor from spinning. Always turn off the power at the breaker before attempting to clear a jam.
Q: How much does it cost to repair a clogged garbage disposal in Toronto?
A: The cost can vary depending on the severity of the clog and whether it’s within the disposal or further down the drainpipe. Simple fixes like clearing a jam yourself cost nothing but time. If you need a professional technician in Toronto/GTA to clear a stubborn jam or clog, it might cost anywhere from $150 to $300 or more.
Q: Are garbage disposals legal to install in Toronto?
A: No, the installation of new garbage disposal units is generally prohibited within the City of Toronto due to municipal wastewater regulations. However, using an existing unit in an older home is typically allowed, and repairing an existing unit is also usually permitted. Regulations may differ in other GTA municipalities, so it’s wise to check local bylaws if considering replacement.
Q: How do I fix a humming garbage disposal?
A: First, turn off the power at the breaker or wall switch. Shine a flashlight down the drain to look for obstructions and remove visible objects with pliers or tongs (never your hand). If no object is visible, use a ¼-inch hex key in the bottom center hole of the unit to try and manually turn the grinding plate back and forth. After clearing any potential jam, wait a few minutes, turn the power back on, and press the red reset button on the bottom of the unit. Run cold water before testing the disposal. If it still hums, you likely need professional help.
