Common Issues We Address for Tankless Water Heater Repairs in Los Angeles
- Water is too hot or too cold or possibly not hot at all
- Leaking from above the water heater
- Rusty or brown-colored water
- Water has a smelly odor
Experiencing another issue not listed? Our trusted professionals can help you identify the problem and work to identify a solution.


Tankless Water Heater Troubleshooting Guide
Santa Clarita Emergency Services
Emergency situations do not always wait until convenient hours. Our emergency service is available 24/7 so that you’re never in the dark. We have a team of professionals available to assist you 24/7, regardless of the emergency.
Inconsistent Temperatures
What to Look For: Fluctuating hot and cold water during use.
What Might Be Going On: This could be due to sensor malfunctions or mineral buildup affecting the heating element.
Risks of Not Repairing: Prolonged issues can lead to complete system failure, higher energy bills, and potential safety hazards.
Spotting Leaks
What to Look For: Water pooling around the unit or dampness on the walls.
What Might Be Going On: Internal issues like a faulty valve or seal might be causing the leak.
Risks of Not Repairing: Water damage to your property, mold growth, and reduced efficiency of the unit.
Water’s Rusty or Smells Off
What to Look For: Brownish discoloration in water or an unpleasant odor when you turn on the tap.
What Might Be Going On: Bacteria buildup can cause the unpleasant smell. Tankless systems typically don’t store water long enough for rust, but check for external rust or corrosion on the unit.
Risks of Not Repairing: Health concerns from consuming contaminated water and further damage to the unit.
Mineral Buildup
What to Look For: Reduced water flow or white scale deposits around connections.
What Might Be Going On: Hard water can cause calcium and magnesium deposits inside the heater, affecting its efficiency.
Risks of Not Repairing: Reduced efficiency, increased energy bills, and potential system failure.
System Overload
What to Look For: The system shutting down when multiple hot water outlets are used simultaneously.
What Might Be Going On: The heater’s capacity is being strained beyond its limits.
Risks of Not Repairing: Frequent system shutdowns, reduced lifespan of the unit, and inconsistent hot water supply.
Ventilation Concerns
What to Look For: Signs of soot around the unit or an unfamiliar odor.
What Might Be Going On: Proper ventilation is crucial for gas-fueled tankless heaters. Blockages can affect combustion air or venting, leading to reduced efficiency or safety hazards.
Risks of Not Repairing: Potential carbon monoxide buildup, reduced efficiency, and fire hazards.
Electrical Hiccups
What to Look For: The system not powering on, frequent shutdowns, or tripping circuit breakers.
What Might Be Going On: Faulty wiring or component malfunctions can disrupt the heater’s operation, especially for electric tankless units.
Risks of Not Repairing: Complete system failure, potential electrical fires, and safety hazards.
Our Greater Los Angeles Service Area
We proudly serve the wonderful people of the Greater Los Angeles area including Agoura Hills, Alhambra, Altadena, Arcadia, Artesia, Avalon, Azusa, Baldwin Park, Bell, Bell Gardens, Bellflower, Beverly Hills, Brandeis, Buellton, Burbank, Calabasas, Canoga Park, Carson, Cerritos, Chatsworth, City of Industry, Claremont, Compton, Covina, Culver City, Diamond Bar, Downey, Duarte, El Monte, El Segundo, Encino, Fillmore, Gardena, Glendale, Glendora, Granada Hills, Hacienda Heights, Harbor City, Hawaiian Gardens, Hawthorne, Hermosa Beach, Huntington Park, Inglewood, La Canada Flintridge, La Crescenta, La Mirada, La Puente, La Verne, Lake Hughes, Lakewood, Lancaster, Lawndale, Littlerock, Lomita, Long Beach, Los Alamitos, Los Angeles, Los Angeles County, Los Olivos, Lynwood, Malibu, Manhattan Beach, Marina Del Rey, Maywood, Mission Hills, Monrovia, Montebello, Montrose, Moorpark, Mount Wilson, Newbury Park, North Hills, North Hollywood, Northridge, Norwalk, Oak Park, Oak View, Ojai, Oxnard, Pacific Palisades, Pacoima, Palmdale, Palos Verdes Peninsula, Panorama City, Paramount, Pasadena, Pearblossom, Pico Rivera, Piru, Playa Del Rey, Playa Vista, Point Mugu Nawc, Pomona, Porter Ranch, Port Hueneme, Port Hueneme Cbc Base, Rancho Palos Verdes, Redondo Beach, Reseda, Rosemead, Rowland Heights, San Dimas, San Fernando, San Gabriel, San Marino, San Pedro, Santa Barbara, Santa Fe Springs, Santa Monica, Santa Paula, Sherman Oaks, Signal Hill, Simi Valley, Somis, South El Monte, South Gate, South Pasadena, Studio City, Summerland, Sun Valley, Sunland, Sylmar, Tarzana, Temple City, Thousand Oaks, Topanga, Torrance, Tujunga, Universal City, Valley Village, Van Nuys, Venice, Verdugo City, Ventura, Walnut, West Covina, West Hills, West Hollywood, Westlake Village, Whittier, Wilmington, Winnetka, and Woodland Hills.
Los Angeles CastleWorks Office
28358 Constellation Rd Ste 698
Valencia, CA 91355