24/7 Emergency Service

Count on Action Plumbing, Heating, AC & Electric for 24/7 emergency services to quickly restore your home comfort systems with prompt, professional, and reliable solutions.

Give Us a call (608)-837-3638 Schedule Online
$250 OFF Any Tankless Water Heater Request Service

Tankless Water Heater Repair in Sun Prairie, WI

We offer tankless water heater repairs throughout the Sun Prairie area, and our skilled plumbers are available 24/7 for emergency service. Founded in 1989, our company puts customers first, and we are proud to help our neighbors with all their home plumbing needs. As a family-owned and family-focused business, we aim to provide the best value for your money with top-quality work, an excellent customer service experience, no upselling, and valuable coupons and special offers that help you to save money.

Call Action Plumbing, Heating, A/C & Electric today at (608)-837-3638 or contact us online for 24/7 emergency repair services in Sun Prairie or Madison.

24/7 Emergency Repair

Tankless water heaters work by heating water on demand, eliminating the wasted energy that storage tank water heaters use to always keep water warm. They can reduce utility costs significantly, which is why they are a great upgrade for many homes in the Sun Prairie area.

When something goes wrong with your tankless water heater, you can count on our team at Action for fast, professional water heater repairs. We are available 24 hours a day for emergency service and repair most brands, including gas and electric models. And if your tankless water heater can’t be repaired due to its age or condition, we also offer same-day water heater replacement throughout Sun Prairie and the Madison area.

Signs Your Tankless Water Heater Needs Repair

Call Action for repairs if you notice any problems with your tankless water heater, such as:

  • Lukewarm or cool water: A malfunctioning thermostat, a faulty gas valve, a damaged heating element, or a clogged heat exchanger can prevent the water from heating adequately.
  • The water heater shuts off repeatedly: If your water heater isn’t supplied with the correct amount of water due to a clogged water filter or heat exchanger, it will shut off prematurely as a safety feature.
  • Low hot water pressure: Over time, sediment and mineral accumulations can build up in the heat exchanger, restricting the flow of hot water.
  • Poor water quality: If your hot water is discolored, smells odd, or has sediment, there may be a problem with the water heater, its filter, or your water supply.

Why Choose Action Plumbing, Heating, A/C & Electric?

Make sure you have all the hot water you need with tankless water heater repairs from Action Plumbing, Heating, A/C & Electric. We are available whenever you need us in the Sun Prairie area. We offer top-quality repairs with transparent, upfront pricing and a 100% satisfaction guarantee. We believe the customer is always right, and our team will work hard to ensure your satisfaction. This belief is reflected in our excellent customer reviews, our A+ rating from the BBB, and our awards from Angi.

Call Action Plumbing, Heating, A/C & Electric (608)-837-3638 or contact us online to schedule tankless water heater repair services in Sun Prairie, Madison, or the surrounding areas.

Tankless Water Heater FAQs


With proper maintenance and regular flushing of the heat exchanger, you can expect a tankless water heater to last 20 to 25 years or longer. To get the most from your tankless water heater, schedule maintenance once a year, change your water filter often, service your water softener, and call our team at Action for repairs as soon as your notice any problems.

Easily, the most common problem in tankless water heaters is mineral accumulation or limescale in the heat exchanger. This can usually be prevented with periodic flushing of the heat exchanger and routine maintenance. Other common problems include igniter or flame sensor failures, faulty gas valves, a clogged exhaust, faulty thermostats, damaged heating elements, or leaks.

If your tankless water heater stops working, ensure the circuit breaker is not tripped, then check your water filter and replace it if necessary. Make sure the air intake and exhaust are not blocked and the gas valve is open. Call our Action team for repairs if it still won’t function properly.

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What To Expect

Discover The Difference

100% Customer Satisfaction

We're in the business of keeping our customers satisfied with every repair, installation, and maintenance appointment we fulfill.

Experience-Forward

Our friendly and experienced technicians work their hardest to minimize all stress and disruption associated with service.

Same-Day Water Heater Installs

We know how stressful it is to be left without hot water, so we offer same-day water heater installation for your ultimate convenience.

Value-Focused

You'll never go through unnecessary upsells with Action because we believe in providing maximum value for every customer.

Family-Owned

As a family-owned business, we prioritize providing our neighbors with the best customer service in the industry.

Online Specials

Home services can sometimes be a challenge to finance, so we offer various online specials to put repairs and installation within reach.

100% Customer Satisfaction

We're in the business of keeping our customers satisfied with every repair, installation, and maintenance appointment we fulfill.

Experience-Forward

Our friendly and experienced technicians work their hardest to minimize all stress and disruption associated with service.

Same-Day Water Heater Installs

We know how stressful it is to be left without hot water, so we offer same-day water heater installation for your ultimate convenience.

Value-Focused

You'll never go through unnecessary upsells with Action because we believe in providing maximum value for every customer.

Family-Owned

As a family-owned business, we prioritize providing our neighbors with the best customer service in the industry.

Online Specials

Home services can sometimes be a challenge to finance, so we offer various online specials to put repairs and installation within reach.

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Our Reviews

See What Your Neighbors Are Saying

I needed our heater fixed and they were able to make it happen the same day. Andrew came out, was thorough in his diagnosis & explanation, and repaired our heater. I appreciate the service and am thrilled it was able to be done at the time…

Deb C.

Deb C.

We had Troy from Action Plumbing help us today with an outside faucet issue and he did a great job. He was fast acting, considerate, and offered some ideas for use to pursue in the spring with warmer weather. Thanks Troy!

Brenda W.

Brenda W.

Just had Andrew fix our furnace. He was amazing, helped me to understand what I needed to do so that furnace stays in good condition. Also very reasonable priced.

Rayne L.

Rayne L.

Water heater went out overnight. Gave them a call at 7 am and they were at the house by 9. Highly satisfied. This is the third time I have used Action (2 plumbing, 1 electrical) and they have always done a great job. Pricing is competitive/fair…

Ross C.

Ross C.

We are very happy with all the hard work the guys all did today! I would highly recommend this company they were all great an very polite. Can't thank you guys enough for all the work that was done today. They were all awesome.

Katie R.

Katie R.