What to Expect from a Tankless Hot Water Heater Maintenance & Tune Up Service?

We offer all the installation, maintenance and repair services that your home’s hot water system may need, no matter the problem or time of year. You can count on the trusted professionals at Mainstream for:

Expert advice from professionally licensed, certified technicians

Upfront pricing – you'll never pay more than what we quote

Customer commitment and satisfaction guarantee on any work we do

Ask about availability of our same-day-service

Check out why your neighbors trust us to get the job done right

Very personable and patient!

Both technicians that came to our home were great! They were very personable, and very patient. My mother in-law has a hard time with her English, as it is her second language, but they were both very patient with her, and made sure she understood everything that needed to be done. On their customer service alone I would recommend this company. We live in an old 1980's trailer which made it hard to find parts needed to fix our heating system, but they did all the research they could to try and find the parts needed. I am so glad I decided to call Mainstream Electric and will continue to use their services in the future.
Analee B.


Cody was respectful, personable, courteous, answered all our questions we had during his visit, knowledgeable. Cody helped us get in touch of the appropriate people, to finance the work that our home needs. He helped get the work scheduled so that we wont need to wait longer to get the work taken care of.
Crystal N.

Highly Recommend

The entire team was very responsive and nice. Handled scheduling quickly. Process was clearly outlined at multiple points in the job to ensure expectations were being met. Took 48 hours from time I reached out to complete issue resolution. Highly recommend
Jenn C.


Jaymin was very professional and friendly. Was knowledgeable and got right down to business. Did a great job! He deserves a KUDOS!! 👍 Daryl was also very professional and friendly. He was knowledgeable and explained the problem very clearly. He's also a good salesman! KUDOS to him, as well!! 👍
Judy W.
Read all our reviews

Why Should You Get a Water Heater Tune-Up in Spokane, Washington?

Before winter’s chill gets here, you want to ensure your water heater is at 100% with all the hot water you’ll need. That's why it's so important to have your water heater tuned-up with annual maintenance. Tankless hot water heater maintenance tune-ups have 3 primary benefits:

Increased Water Heater Efficiency & Save More Money

One of the most common issues that can occur in your tankless water heater is sediment buildup from loose minerals in your water supply. The more mineral buildup, the less efficient your water heater becomes. Banging or knocking is usually an indication of buildup in the heat exchanger of your tankless water heater, which means it's time to call the experts at Mainstream to get your annual tankless water heater maintenance.

Minimize Risk of Water Heater Breakdown

Annually having your tankless water heater maintained decreases the risk of a costly tankless water heater repair or replacement. Our experts will tune-up your tankless water heater but also check for any additional signs of corrosion, water leaks, or anything that may be keeping your tankless water heater from functioning at 100%.

Ensure You Have Hot Water All Year Long

There's nothing worse than waking up to cold water running through your plumbing. Ensure it doesn't happen to your water heater by getting your annual maintenance tune-up scheduled today with the plumbers at Mainstream.

No matter the season, our plumbers will ensure your tankless water heater is 100% functional and ready for your hot water needs. Our experts will notify you of any necessary repairs before any work is done so you know exactly what solution is best for your home’s water heater system.

Call Mainstream Today!

Is your home's water heater experiencing issues? Mainstream is the trusted name in water heater maintenance and tune up services near you.

Schedule your water heater tune up cost estimate service today and ensure your tankless water heater unit is running smoothly all year long!

Special Offers in Spokane Valley, Washington

FREE Service Call with Repair

Schedule Now
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers
FREE Furnace Special*

Taxes aren't free, but your furnace could be! When you purchase a Daikin air conditioner, you'll receive a Daikin furnace for free! We'll also include a complete heating and cooling system check! Financing options available.   *Free labor and installation are not included on furnace.

Schedule Now
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers
$79 Once a Year, You’re in the Clear HVAC System Checks
Original Price: $ 129
Savings:$ 50
Sale Price:$79

Super convenient Heating & A/C Check. Why are checks important?

  • Keeps your systems running at peak efficiency
  • Helps prevent unexpected breakdowns
  • Extends the life of your equipment
  • Keeps your family safe from carbon monoxide leaks

Schedule Now
Call for Conditions & Restrictions / Present Coupon at Time of Service / Not Available to Combine with Other Offers

Arrange a callback

Leave us your details below and we'll give you a call right back

Font Resize