Plumbing Services
Is your tankless unit sputtering cold water or showing error codes? We diagnose and fix issues, restoring consistent hot water to your home.
Book tankless water heaters
Tell us what the system is doing and we will get you an arrival window.
Rep-Air Heating and Cooling's licensed plumbers repair and service tankless water heaters across the Fraser Valley. If your unit runs cold mid-shower, flashes error codes or delivers only a trickle, we are ready to diagnose and fix these issues.
Ignoring early indicators of trouble can turn a simple repair into a costly replacement. As experienced plumbers working with hundreds of tankless units across the Fraser Valley, we've seen these symptoms countless times. Pay attention to these common warning signs.
Your shower water keeps fluctuating between hot, lukewarm, and outright cold without warning. Or maybe it takes an unusually long time for hot water to reach your faucets after you turn them on. This often points to issues with the unit's flow sensor, a clogged heat exchanger, or a burner struggling to maintain a consistent flame. Beyond the obvious discomfort, these fluctuations can be a sign of internal scaling or component failure, leading to higher energy use and eventual breakdown if ignored.
You've noticed the hot water coming out of your faucets or showerheads seems weaker than usual, even if the cold water pressure is perfectly fine. In many areas of the Fraser Valley, hard water and its mineral deposits are the common culprit here. These minerals build up inside the tankless unit's heat exchanger, narrowing the pathways for water flow and essentially "clogging up" the unit from the inside. This forces your unit to work harder, reducing its efficiency and potentially causing permanent damage to the heat exchanger.
Your tankless water heater has a digital display, and it’s showing a cryptic letter and number combination instead of the temperature. Modern tankless units have sophisticated diagnostic systems, and an error code is the unit's way of telling you precisely what internal component is malfunctioning or what protective measure has been triggered. These codes are critical warnings that can indicate anything from flame failure to exhaust blockages or overheating conditions. Ignoring them means you're operating a potentially unsafe or damaged appliance, which could lead to complete breakdown or dangerous situations like carbon monoxide concerns.
You hear unusual sounds like popping, banging, rumbling, or gurgling coming from your tankless unit, especially when hot water is being used. Popping or banging often indicates mineral buildup inside the heat exchanger, a phenomenon known as "kettling, " where water gets trapped and boils. Gurgling can point to air in the lines or issues with the exhaust venting, while a grinding or whirring sound might suggest a failing fan motor. These noises are almost always a sign of undue stress on components, which will eventually lead to failure and more expensive repairs if not addressed promptly.
Understanding why your tankless water heater is acting up is the first step toward a lasting fix. Based on our extensive experience in Fraser Valley homes, these are the most frequent culprits we encounter.
Many areas across the Fraser Valley have water with a higher mineral content, often referred to as "hard water." When this hard water is heated rapidly by a tankless unit, minerals like calcium and magnesium precipitate out and adhere to the inside of the heat exchanger. This creates a layer of scale over time. The primary solution for this is a professional descaling or flushing service, using specialized solutions to dissolve these mineral deposits and restore the unit's efficiency and flow. Regular annual maintenance is crucial for prevention.
Sometimes, a tankless unit was initially installed that simply isn't powerful enough to meet the hot water demands of your household, especially in larger Fraser Valley homes or those with multiple occupants. This can also happen if renovations added more hot water fixtures without upgrading the tankless unit, or if the initial gas line or venting wasn't sized correctly for the unit's high BTU requirements. This often requires a thorough assessment of your home's hot water usage and the existing unit's specifications, potentially leading to adjustments or, in some cases, replacement with a properly sized unit.
Tankless water heaters require a substantial and consistent supply of natural gas or propane to operate efficiently. If the gas line is too small, there's insufficient gas pressure, or if the unit's ventilation system for combustion byproducts is blocked or improperly installed, the unit won't be able to achieve or maintain its full heating capacity. Our licensed gas fitters will inspect your gas line sizing, pressure, and the entire venting system. Solutions can involve upgrading the gas line, clearing blockages, ensuring proper vent termination, or repairing faulty gas valves or regulators, all while strictly adhering to Technical Safety BC regulations for your safety.
Unlike traditional tank heaters, tankless units require specific annual maintenance, primarily flushing to remove mineral buildup. If this isn't done, the problems mentioned above: scaling, reduced flow, inefficiency, and error codes, are almost guaranteed to occur. A comprehensive annual tune-up is essential, typically including flushing the unit, inspecting the burner and igniter, checking for leaks, cleaning filters, and ensuring all safety controls are functioning correctly. This proactive approach significantly extends the life and efficiency of your tankless water heater.
When you call Rep-Air Heating and Cooling for your tankless water heater issues across the Fraser Valley, you can expect a professional, thorough service. Our licensed plumbers and gas fitters will arrive equipped to diagnose the problem, starting with a detailed assessment. We check error codes, inspect the unit's components, and evaluate your home's hot water demands and existing gas and water lines.
We’ll explain our findings in clear, straightforward language, outlining the root cause of the issue and the recommended solutions. Whether it's a descaling flush, a component replacement, or a more complex gas line adjustment, we ensure all work adheres to Technical Safety BC standards. Our goal is to restore your consistent hot water with minimal disruption, ensuring lasting performance and peace of mind.
No matter where you are in the Fraser Valley, from the bustling communities to the quieter stretches, Rep-Air Heating and Cooling is your trusted partner for tankless water heater expertise. Our certified technicians serve homes and businesses across the entire region, bringing our expertise right to your doorstep.
Central Fraser Valley: Abbotsford, BC, Babich, BC, Bradner, BC, Clearbrook, BC, East Townline, BC, Fairfield, BC, Kilgard, BC, Lower Ten Oaks, BC, Matsqui, BC, Matsqui Prairie, BC, McKee, BC, McMillan, BC, Mill Lake, BC, Mount Lehman, BC, Old Clayburn, BC, South Clearbrook, BC, South Poplar, BC, Sumas Mountain, BC, Sumas Prairie, BC, Townline Hill, BC, Upper Ten Oaks, BC, West Abbotsford, BC, West Townline, BC, Whatcom, BC
Mission & North Fraser: Mission, BC, Aberdeen, BC, Cedar Valley, BC, Cherry Hill, BC, Cottonwood, BC, Dewdney, BC, Downtown Mission, BC, Ferndale, BC, Hatzic, BC, Iron Mountain, BC, Ruskin, BC, Silverdale, BC, Stave Falls, BC, Steelhead, BC, West Heights, BC
Maple Ridge & Pitt Meadows: Maple Ridge, BC, Pitt Meadows, BC, Albion, BC, Central Meadows, BC, Downtown Pitt Meadows, BC, East Maple Ridge, BC, Hammond, BC, Haney, BC, Kanaka Creek, BC, Mid Meadows, BC, North Meadows, BC, Pitt Boulder, BC, Rock Ridge, BC, Silver Valley, BC, South Meadows, BC, Thornhill, BC, Town Centre, BC, Webster's Corners, BC, West Meadows, BC, Whonnock, BC, Yennadon, BC
Langley & Surroundings: Langley, BC, Aldergrove, BC, Alice Brown, BC, Blacklock, BC, Brookswood, BC, Campbell Valley, BC, Douglas, BC, Fernridge, BC, Forest Knolls, BC, Fort Langley, BC, Glen Valley, BC, Highland Park, BC, Hopington, BC, Milner, BC, Murrayville, BC, Nicomeki, BC, Otter District, BC, Salmon River Uplands, BC, Simonds, BC, Uplands, BC, Walnut Grove, BC, Willoughby, BC, Willowbrook, BC
Southwest Fraser & Tri-Cities: Coquitlam, BC, Port Coquitlam, BC, Northwest, BC, Southwest, BC, West Central, BC
Eastern Fraser Valley: Chilliwack, BC
Maintaining a tankless water heater often goes hand-in-hand with ensuring other critical plumbing systems are up to par. For instance, if your tankless unit is struggling due to inadequate fuel supply, you might also need a professional assessment of your Gas Line Installation. Ensuring your home's gas lines are correctly sized and safely installed is paramount for the efficient and safe operation of high-demand appliances like tankless water heaters.
Don't let a faulty tankless water heater disrupt your daily life or leave you with unexpected cold showers. The promise of endless hot water is achievable, but only with a unit that's properly installed and maintained. If you're experiencing any of the warning signs, or simply want to ensure your tankless system is running at its best, trust the licensed plumbers at Rep-Air Heating and Cooling. We're here to bring reliable hot water back to your Fraser Valley home. Contact us today to schedule your service.
Before You Book
A service visit is $189, and that fee is waived when you go ahead with the repair or installation we quote. Estimates for new equipment are free. Your technician diagnoses the problem first, shows you the readings and photos behind it, and gives you a written estimate, often with a few options, before touching anything. Work starts only when you approve it. Questions first? Call (778) 728-1956.
It comes down to the age of the equipment, the size of the repair, and how well the system is keeping up. Past roughly 12–15 years, a major repair usually costs more over the next few winters than replacing does, especially once rebates are counted. Your technician lays out both numbers and you decide.
Get a free replacement quote →Financing runs from $1,000 to $100,000, so a big repair can be paid monthly too. See how financing works.
Heating, cooling, plumbing, and electrical service across the Fraser Valley, from a locally owned team.
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