Tankless water-heater service

Tankless Water Heater Repair & Maintenance

Professional plumbing service

Experienced plumbers. Upfront pricing.

Citrusline repairs and maintains Navien, Rinnai, Noritz, Rheem, and other tankless water heaters throughout Riverside and Corona. We handle error codes, temperature swings, ignition failures, low flow, cold-water bursts, leaks, and overdue descaling.

Plumber checking a wall-mounted tankless water heater in a Riverside garage

What we do

What this service includes

Tankless problems we repair

We troubleshoot units that will not ignite, shut down during use, display fault codes, leak, make unusual noise, or deliver inconsistent temperatures. Our plumber checks flow, filters, controls, fuel or power, venting, condensate, and the water path before pricing a repair.

Flow and sizing matter

A tankless heater must sense enough flow to turn on and have enough capacity for the fixtures running at the same time. We check fixture flow, filters, settings, incoming water temperature, gas or electrical supply, and the unit's size for the household.

Descaling for hard-water buildup

Riverside averages 12 grains per gallon of hardness, and Corona reports hard to very hard water. Mineral scale can restrict the heat exchanger and reduce performance. Citrusline provides manufacturer-recommended flushing, descaling, and filter service.

Repair, replace, or upgrade

When a repair is practical, we price it first. If the unit is at the end of its life or undersized, we provide a replacement option that includes venting, gas or electrical requirements, condensate, permits, startup, warranty registration, and haul-away.

Helpful answers

Frequently asked questions

Can you repair a tankless water heater the same day?

Same-day service is available when a trained plumber and the needed part are available. Share the brand, model, and exact error code so our office can prepare the appointment.

Why does a tankless water heater turn cold during a shower?

Low flow, a dirty inlet filter, simultaneous demand, a control or sensor problem, scale, or an undersized unit can cause temperature changes. We inspect the system instead of guessing from the symptom.

Can hard water affect tankless equipment?

Yes. Scale can restrict the heat exchanger and reduce flow or efficiency. Regular flushing and descaling are especially important in Riverside and Corona because both cities report hard-water conditions.

What is reviewed before replacing a tankless water heater?

We size the replacement for household demand and verify gas or electrical capacity, venting, condensate drainage, water connections, clearances, permits, and service access before quoting the installation.

Same-day and 24/7 emergency service

Need a plumber in Riverside or Corona?

Book online now. For an active leak, sewer backup, burst pipe, or no hot water, our dispatch team answers around the clock.