
Our certified plumbing technicians diagnose and repair all tankless water heater brands and models. From Navien and Rinnai to Noritz, Takagi, Bosch, Rheem, and more, we have the need-to-know expertise to restore your endless hot water quickly.
We understand tankless water heaters provide essential hot water for your family. Our emergency on-demand water heater repair service provides same-day response for urgent failures, ensuring your family’s comfort and convenience.
You receive clear diagnostic assessments and detailed repair quotes before work begins. No hidden fees. When researching “how much does tankless repair cost,” we provide honest answers with upfront pricing.
Our comprehensive diagnostic process uses manufacturer-specific tools and error code analysis. We assess heat exchangers, gas valves, flow sensors, ignition systems, venting, and electronic controls to ensure lasting repairs.
Trustindex verifies that the original source of the review is Google. Chad GroverGreat people to deal with whether it’s Peter Sandy or any one they send to the house. Always take the time to show you the problem and never up sellTrustindex verifies that the original source of the review is Google. Gerald GuenettePeter is very friendly and out going. He will make sure everything is good and your happy before he is doneTrustindex verifies that the original source of the review is Google. Patricia TetzlaffNathan was very knowledgeable and professional. You never get better service with any company like you do with Sherwood Mechanical. They do excellent work and stand behind it. Great people to deal with.Trustindex verifies that the original source of the review is Google. Kyle HuberI received a referral for Sherwood Mechanical from a colleague, and I'm very pleased with the service provided (new central AC install). The technicians were quick and polite, the pricing was more than reasonable, and their text message updates were much appreciated so they'd let me know who was coming and at what time. When we need a new furnace, they'll be sure to get my business again.Trustindex verifies that the original source of the review is Google. Caroline PierceHi! I just can't say enough great things about this company! They are reliable and respond quickly to calls! The furnace at my mom's house stopped working and they diagnosed it and replaced the motor on the day and in the time frame they gave us.Trustindex verifies that the original source of the review is Google. T NI had annual maintenance done on my air conditioner. The technicians were very nice and professional. Excellent service. I would definitely call them again.Trustindex verifies that the original source of the review is Google. Daryl LysengMay 19, 2026 Today Peter and Nathan came by to replace the Flame Sensor and ignighter in my Navien and do a maintenance on my Trane Air Conditioner until - and they also readjusted my Trane Thermostat. Peter took the time to explain features of my Navien and the Trane unit and answered every question I had about both systems. I really enjoyed the time they spent here and learned a lot today. November 12, 2025 Brian arrived on time and quickly got to work installing my new Trane XL 850 Thermostat. The installation was a bit tricky because I had run the CAT 6 cable to the wrong side of the thermostat. But Brian was very patient and explained what he was doing the entire way. Brian also answered all of my questions when he serviced my Trane Furnace and my Navien Tankless system In the early Summer, I'm booking him to service my Air Conditioning unit as well.Trustindex verifies that the original source of the review is Google. Colleen FrederickThank you again Sherwood Mech for a new water heater and an air condition clean. Always the best service.Trustindex verifies that the original source of the review is Google. Trish BoneVery professional prompt service! We would definitely recommend Sherwood Mechanical Services to our family and friend's for all your Furnace and Air Conditioning needs! Thanks Peter, Jackson and all your excellent staff! Trish and DougTrustindex verifies that the original source of the review is Google. Barbara MullenGreat full service of my furnace by Peter. I would highly recommend Sherwood Mechanical for the prompt and valuable service.

Repair heat exchanger scale, gas valves, sensors, ignition, flame rods, vents, leaks, control boards; restore efficient on-demand hot water systems.
We use manufacturer-approved OEM parts for reliable repairs, warranty protection, code compliance, and longer system life.
We test heating, flow, temperature, combustion, venting, and controls after repairs to ensure proper operation before completion.
Our certified plumbing technicians perform thorough diagnostics using advanced testing equipment and error code analysis. We assess heat exchangers, gas valves, flow sensors, ignition systems, flame rods, venting systems, water connections, and electronic control boards.
We identify underlying issues causing your tankless water heater problems, not just surface symptoms. This diagnostic approach prevents recurring failures and ensures cost-effective repairs.
You receive clear explanations of problems found, repair options available, and transparent pricing for all work. We help you make informed decisions about your tankless water heater system.
All tankless water heater repairs include warranty coverage on parts and labor, providing peace of mind and protection for your investment.
We follow up to ensure your on-demand water heater continues operating properly after repair service.

Tankless water heaters display error codes indicating specific problems. Our technicians diagnose error codes quickly and repair underlying issues to restore proper operation.

Complete loss of hot water indicates gas valve failure, ignition problems, or flow sensor issues. We diagnose and repair heating system failures quickly.

Temperature fluctuations suggest flow sensor problems, heat exchanger scale buildup, or control board issues. We repair temperature control systems for consistent endless hot water.

Brief cold water bursts between hot water draws indicate buffer tank issues or control settings. We optimize system operation to eliminate temperature inconsistencies.

Decreased flow rates suggest heat exchanger scale buildup, water filter blockages, or flow sensor problems. We restore proper flow and heating capacity.

Rumbling or vibration sounds indicate scale buildup, gas valve issues, or combustion problems requiring immediate attention. We diagnose and repair noise issues.



Applied toward repair costs

Prevent future problems with regular service

Fast response when you need endless hot water restored

We’re here when you need us most
When your tankless water heater fails, every hour without hot water affects your family’s comfort and daily routines. Contact Sherwood Mechanical Services for fast, reliable tankless water heater repair near you.
Speak directly with our certified plumbing technicians for immediate assistance
Get same-day service scheduling
Schedule a comprehensive on-demand water heater evaluation




