Filtration systems rarely fail all at once. More often, there are early warning signs that something is wrong — signs that are easy to miss if you are not paying attention. Here is what to watch for with each major system type.

Signs Your Water Softener Needs Repair

• Hard water symptoms have returned — scale buildup on fixtures, spots on dishes, stiff laundry, or dry skin after showering are the clearest indicators that your softener is no longer working as intended
• Salt bridges or salt mush in the brine tank — a hard crust forming above the water level (salt bridge) or a mushy salt layer at the bottom of the tank (salt mush) prevents proper regeneration and is a common cause of softener failure
• The system is regenerating too often or not at all — a control valve or timer issue can disrupt the regeneration cycle, causing either excessive salt and water use or no regeneration at all
• Water pressure has dropped throughout the home — a clogged resin bed or a failed bypass valve can restrict flow and reduce pressure at every tap
• The brine tank is overflowing — a faulty float valve or blocked drain line can cause the brine tank to overfill, which disrupts the entire regeneration cycle and can cause water damage
• Unusual noises during regeneration — clicking, grinding, or motor sounds that are louder than normal often indicate a failing control valve motor or head assembly
• Error codes on the control display — modern demand-initiated softeners display fault codes when internal sensors detect an issue; these should always be investigated promptly

Signs Your Reverse Osmosis System Needs Repair

• Very slow water flow from the RO tap — the most common complaint, usually caused by a depleted storage tank pressure, an exhausted membrane, or a clogged pre-filter
• No water at all from the RO faucet — typically indicates a failed storage tank, a closed feed valve, or a completely blocked membrane or pre-filter cartridge
• Water tastes or smells unusual — if the clean, neutral taste of RO water has changed, the membrane may be compromised or post-filter carbon needs replacement
• Constant draining — if your RO system runs water to the drain continuously without filling the tank, the check valve or auto shut-off valve has failed
• Visible leaks at connections or the faucet base — fitting connections, tubing, and faucet bases can develop slow leaks that cause water damage under the sink if left unaddressed
• The storage tank feels very light and never fills — may indicate a ruptured tank bladder, which requires tank replacement

Signs Your Whole-Home Carbon Filter Needs Repair or Servicing

• Chlorine taste or odour has returned — the most straightforward sign that the carbon media is exhausted and needs replacement or the filter housing has been bypassed
• Reduced water pressure throughout the home — a severely clogged or collapsed filter cartridge creates significant flow restriction across all fixtures
• Leaks at the filter housing or connections — O-ring failures, cracked housings, or loose fittings can cause slow leaks that damage surrounding cabinetry or flooring
• The filter housing will not open for cartridge replacement — pressure trapped in the housing is a common cause; this requires proper depressurization before servicing

Signs Your Sediment Filter Needs Attention

• Visible discolouration or particles in the water — brown, orange, or cloudy water coming from taps indicates the sediment cartridge is saturated and no longer capturing particles effectively
• Significant pressure drop at all fixtures — a fully clogged sediment cartridge acts like a closed valve, dramatically restricting flow throughout the home
• Discoloured cartridge on inspection — if you can see the filter cartridge, a heavily discoloured or visibly loaded cartridge needs immediate replacement

Our technicians are experienced with the full range of repairs across all filtration system types. Here are the most common service calls we handle across Ontario.

Water Softener Repairs

• Control valve repair and replacement — the control valve is the brain of the softener, directing water flow through regeneration cycles. Worn seals, failed motors, or cracked valve bodies are common failure points that we diagnose and repair or replace on-site
• Resin bed replacement — over time (typically 10 to 15 years), ion exchange resin beads degrade and lose their capacity to soften water. When cleaning and backwashing no longer restore performance, a full resin replacement restores the system to like-new effectiveness
• Brine tank cleaning and float valve repair — salt bridges and salt mush require manual breaking and cleaning. Faulty float valves that cause overfilling or underfilling of the brine tank are replaced as part of the same service
• Injector and venturi cleaning — the injector draws brine from the tank into the resin bed during regeneration. Mineral fouling of the injector or venturi assembly is a frequent cause of softener failure and is resolved with thorough cleaning or component replacement
• Timer and circuit board repair — on electronically controlled systems, failed timers or circuit boards can disrupt regeneration scheduling entirely
• Bypass valve repair or replacement — a stuck or leaking bypass valve prevents the softener from being isolated for service or allows untreated water to bypass the resin bed
• Salt bridging resolution — physical removal of salt bridge formations and inspection of the brine tank to identify what caused the bridging and prevent recurrence

Reverse Osmosis System Repairs

• Filter cartridge and membrane replacement — exhausted pre-filters or a fouled RO membrane are the most common causes of poor performance; we replace all stages and test output water quality before completing the service
• Auto shut-off valve replacement — a failed ASO valve causes constant drain flow and prevents the storage tank from filling; replacement restores normal system operation
• Check valve replacement — a faulty check valve allows treated water to back-flow toward the drain; replacement is a straightforward repair that resolves continuous drain running
• Storage tank replacement or re-pressurization — tanks with a ruptured bladder cannot hold water and must be replaced; tanks that have simply lost their air charge can often be re-pressurized to the correct specification (typically 7 to 8 PSI when empty)
• Faucet and fitting repair — leaking RO faucets, push-fit connections, and tubing are repaired or replaced; all connections are tested under pressure before the job is closed
• Feed water pressure issues — RO systems require a minimum incoming pressure (typically 40 PSI) to produce water at a normal rate; if household pressure is low, we assess options including a booster pump installation

Whole-Home Carbon and Sediment Filter Repairs

• Filter housing inspection and cartridge replacement — we inspect the housing for cracks, O-ring wear, and correct cartridge sizing before installing a fresh cartridge and re-pressurizing the system
• O-ring and seal replacement — leaking filter housings are almost always caused by worn, pinched, or missing O-rings; replacement restores a watertight seal and prevents water damage
• Housing replacement — cracked or damaged filter housings that cannot be sealed reliably are replaced with correctly rated components
• Flow restrictor inspection and replacement — some whole-home systems use flow restrictors to maintain contact time with the filter media; worn or incorrectly sized restrictors are replaced to restore proper filtration performance
• Inlet and outlet fitting repair — threaded and push-fit connections at the filter housing are inspected and repaired if they show signs of leaking or corrosion

One of the most common questions homeowners ask when their water filtration system fails is whether it is worth repairing or whether it is time to replace the unit entirely. There is no universal answer, but here are the factors our technicians weigh when making that recommendation.

Repair Is Usually the Right Choice When:

• The system is less than 8 to 10 years old and the failure is isolated to a single component — a control valve, a membrane, a cartridge, or a seal
• The cost of the repair is less than 40 to 50% of the cost of a new equivalent system
• The system's tank, resin bed, and main structure are in good condition and are expected to last several more years with proper maintenance
• The failure was caused by a missed maintenance task (overdue filter replacement, depleted salt, blocked injector) rather than end-of-life equipment degradation

Replacement Is Usually the Better Choice When:

• The system is 12 to 15 or more years old and showing multiple simultaneous issues
• The cost of repairs approaches or exceeds the cost of new equipment
• The system's technology has been superseded by significantly more efficient options — particularly relevant for older timer-based softeners, which use far more salt and water than current demand-initiated models
• The tank, pressure vessel, or resin bed is damaged or contaminated beyond serviceable condition
• Repeated repairs over the past 2 to 3 years suggest the system is approaching end of life

Our technicians will give you an honest assessment. If your system is repairable and the cost makes sense, we will fix it. If replacement delivers better long-term value, we will tell you that clearly — and we can often complete a new installation the same week.

We know that a malfunctioning water system disrupts your daily routine — and we treat every service call with that urgency in mind. Here is what happens when you call us.

• Same-day or next-day service — we prioritize filtration repair calls and aim to have a technician at your home as quickly as possible, including evenings and weekends
• Accurate diagnosis on the first visit — our technicians arrive equipped with diagnostic tools and a strong working knowledge of all major system brands and configurations; we do not guess
• Transparent pricing before any work begins — we explain what we found, what the repair involves, and what it will cost before we start; no surprises on the invoice
• Parts on the truck — we carry the most commonly needed replacement parts for softeners, RO systems, and whole-home filters, which means most repairs are completed in a single visit
• Full system test before we leave — after completing the repair, we run the system through a full cycle or flow test, check for leaks at all connections, and confirm the output quality before we close the job
• Written service record — you receive documentation of what was found, what was done, and any recommendations for future maintenance or upcoming service needs

Most water filtration system failures are preventable. The overwhelming majority of emergency repair calls we receive are the result of missed filter changes, depleted softener salt, or ignored early warning signs that a small issue was developing. A consistent maintenance schedule catches these things before they become problems.

Constant Home Comfort offers annual maintenance plans for all filtration system types. A plan covers scheduled filter cartridge replacements, brine tank inspections, RO membrane monitoring, full system checks, and priority service response if an issue does arise between scheduled visits. For homeowners who want clean water without the hassle of tracking maintenance themselves, a plan is the most stress-free way to own a filtration system.

Maintenance plan customers also receive discounted rates on any parts or repairs required between scheduled service visits — providing both peace of mind and meaningful long-term savings.

Constant Home Comfort provides water filtration repair services to homeowners across a wide range of Ontario communities, including:

• Greater Toronto Area — Toronto, Markham, Richmond Hill, Vaughan, Mississauga, Brampton, Scarborough, North York, Etobicoke, and surrounding communities
• Durham Region — Oshawa, Whitby, Ajax, Pickering, Clarington
• York Region — Aurora, Newmarket, Stouffville, King City, Thornhill
• Hamilton and Halton — Hamilton, Burlington, Oakville, Milton
• Waterloo Region — Waterloo, Kitchener, Cambridge, Guelph
• London and Area — London, St. Thomas, Strathroy
• Ottawa and Area — Ottawa, Kanata, Nepean, Barrhaven
• Barrie and Simcoe County — Barrie, Innisfil, Orillia

Not sure if we serve your area? Call us and we will confirm coverage for your location. Our dispatch team works 24/7.

How much does water filtration system repair cost in Ontario?

Repair costs vary depending on the system type, the specific fault, and the parts required. Minor repairs such as O-ring replacement, injector cleaning, or pre-filter cartridge replacement typically cost $80 to $200 including labour. More involved repairs such as control valve replacement or RO membrane and tank replacement can range from $200 to $600. We provide a clear, itemized quote before any work begins.

Can you repair a water softener that has not been serviced in years?

In most cases, yes — provided the tank and resin bed are structurally sound. Neglected softeners often have salt bridges, fouled injectors, and clogged brine lines that can be cleaned and restored to working order. If the resin bed is degraded from years without proper salt maintenance, a resin replacement may be required. Our technician will assess the condition honestly and advise you on the best path forward.

My RO water tastes different than it used to. Is that a repair issue?

Yes. A change in the taste or quality of your RO water is almost always caused by an exhausted post-carbon filter or a compromised RO membrane. Both are service items rather than catastrophic failures, and both are resolved with a filter service and membrane replacement. We recommend annual filter changes and membrane inspection every 2 to 3 years to prevent this from occurring.

Is it safe to use my water if my filtration system is not working?

It depends on the system and your water source. If your water softener has stopped working, your municipal water supply is still safe to drink — you will simply experience the effects of untreated hard water. If your RO system has stopped producing water, your municipal tap water remains safe. If you are on a private well and your filtration or UV system has failed, you should avoid drinking or cooking with the water until the system is repaired and the water has been tested.

Do you repair systems you did not install?

Yes. We repair water filtration systems regardless of where they were originally purchased or installed. Our technicians are experienced with all major brands and configurations. We ask that you have any available documentation — model number, installation date, previous service records — on hand when we arrive, as this helps us diagnose issues more efficiently.

What if my system needs a part that is not in stock?

For common system brands and models, we carry the most frequently needed parts on our service vehicles. For less common or older systems that require specialty parts, we will source the component and schedule a return visit as quickly as possible — typically within 2 to 5 business days. We will advise you on expected timing before we leave the initial visit.

Do not wait on a failing filtration system. Delayed repairs often lead to bigger problems — water damage from leaks, fully exhausted membranes that are harder to restore, or prolonged exposure to unfiltered water. Our technicians are available 24/7 and serve homeowners across Ontario from the GTA to Ottawa, Hamilton to Windsor.

Call us any time at 1 (888) 675-5907 for same-day water filtration repair service — or book online through our Water Filtration page for a scheduled repair or maintenance visit.