Navien Heat Exchanger Repair & Descaling in Greater Vancouver
The dual stainless-steel heat exchanger is the heart of a Navien boiler — and its most flow-sensitive part. Scale, restricted flow, and overheating faults (E016/E030) all centre on the heat exchanger. ROMA Heating & Cooling descales, services, and where necessary replaces Navien heat exchangers across Greater Vancouver, restoring efficiency and clearing recurring faults.
Signs of a Navien Heat-Exchanger Problem
- Recurring E016 overheating or E030 exhaust over-temperature codes.
- Falling efficiency and rising gas bills.
- Lukewarm or fluctuating hot water from scale narrowing the passages.
- Leaks around the unit, which can indicate a cracked exchanger.
Scale: The Number-One Enemy
Hard water deposits mineral scale inside the heat exchanger, restricting flow, trapping heat, and triggering overheating codes. In affected parts of Greater Vancouver, annual descaling is the single best way to protect the exchanger and keep your Navien running at its rated efficiency.
How ROMA Services the Heat Exchanger
- Diagnose whether the fault is scale/flow related or a damaged exchanger.
- Flush and descale the heat exchanger to restore flow.
- Test pump, flow, pressure, and combustion.
- Verify temperatures and efficiency, or recommend replacement with genuine parts if the exchanger is cracked or beyond cleaning.
What Our Customers Say
“We had a 12-year-old Navien combi hot water heater and boiler that started to have error messages, E001. Roma arranged service and sorted it out.”
— Alan Info, Google review (★★★★★)
“Roma Heating exceeded my expectations after they replaced my 23-year-old Laars II hydronic boiler.”
— Ed S, Google review (★★★★★)
Frequently Asked Questions
What are signs of a Navien heat-exchanger problem?
Recurring overheating (E016) and exhaust over-temperature (E030) codes, falling efficiency, lukewarm hot water, or leaks around the unit can all point to a scaled or failing heat exchanger.
Can a scaled heat exchanger be cleaned?
Often yes — descaling and flushing restores flow and efficiency and can clear repeat E016/E030 faults if the exchanger itself is sound.
When does a heat exchanger need replacing?
If it is cracked, leaking, or too corroded to clean effectively. We assess whether descaling will fix it or replacement is the better value.
Does hard water damage Navien heat exchangers?
Hard water accelerates scale build-up, which restricts flow and stresses the exchanger — annual descaling helps protect it.
How do you service it?
We flush and descale the heat exchanger, check flow and combustion, and verify temperatures and efficiency, using genuine Navien parts where replacement is needed.
Related Navien & Boiler Services
- Navien Boiler Error Codes (Full Guide)
- Navien Boiler Repair
- Navien E016 Overheating Repair
- Navien E012 Flame Loss Repair
- Navien Combustion Error Repair
- Boiler Leak Repair
Navien Showing This Code? Call ROMA
Resetting clears the lockout but not the cause — the code will return until the fault is fixed. For accurate Navien diagnosis and repair with genuine OEM parts, call (604) 704-0300 or email info@romaheating.ca. Same-day service across Greater Vancouver, gas-licensed since 1999.
What Greater Vancouver Homeowners Say
“Nelson worked hard to get the NTI unit fixed. He was always polite, courteous and on time.”
“As always Nelson was super efficient. Showed up on time and was quick to work. I had a full maintenance done on the fireplaces and furnace. He was awesome. I won’t use anyone else.”
“Excellent service. Andy had a spare Carrier inducer with him which saved us time.”
“Was very prompt to respond to our issues. Technician was scheduled for the day following my initial call.”
“Very professional heating company. Price is reasonable, excellent work.”
“Highly recommend this company. It was a pleasure dealing with Shawn and Nelson.”
“Professional and courteous technicians with attention to detail and customer needs.”
“Always great, friendly service. Serviced the hot water on-demand system. Honest and informative. Thanks!”
“Speedy response time, honest, and professional service from start to finish.”
Why Greater Vancouver Trusts ROMA Heating & Cooling
ROMA Heating & Cooling has installed, repaired and maintained heating and cooling systems across Metro Vancouver since 1999. Our team are TSBC-licensed gas fitters (Gas LGA0202903) and Red Seal-trained technicians — licensed, bonded and insured — and we back every job with upfront, flat-rate pricing and a 100% satisfaction guarantee. We hold a 4.8★ rating from 221+ Google reviews.
- Authorized for 30+ brands (Lennox, Carrier, Viessmann, Navien, Rheem & more)
- Upfront flat-rate pricing — no overtime or hidden fees
- Free, no-obligation estimates on new installations
- Locally owned & operated in Burnaby, BC
No Hidden Fees
Our service rates are transparent and easy to understand. You approve upfront, flat-rate pricing before we start — so you never get a bill you didn’t expect.
Licensed & Bonded
ROMA is a TSBC-licensed gas contractor (Gas LGA0202903). Our technicians are bonded, insured and Red Seal-trained — qualified for any heating or cooling system.
Free Estimates
We offer free, no-obligation estimates on new installations — furnaces, boilers, heat pumps, air conditioners, tankless and hot-water tanks.
ROMA Heating & Cooling is a trusted HVAC contractor serving Metro Vancouver since 1999. We specialize in furnace repair, heat pump installation, boiler services, air conditioning, and emergency heating solutions for residential, commercial, and government clients. Available 24/7, our certified technicians deliver fast, reliable, and affordable HVAC services across Greater Vancouver.