Stiebel Eltron warranties vary significantly by product family — premium tankless gets a longer heat exchanger warranty; point-of-use gets standard 3-year coverage. Labor is not covered on any product line.
| Product | Heat Exchanger / Tank | Parts | Labor |
|---|---|---|---|
| Tempra Plus (residential) | 7 years | 3 years | Not covered |
| DHC point-of-use tankless | 3 years | 1 year | Not covered |
| Mini under-sink tankless | 3 years | 1 year | Not covered |
| SHC mini-tank | 6 years | 1 year | Not covered |
| Accelera 300 E | 10 years | 5 yr compressor / 2 yr parts | Not covered |
| Commercial application | 1-3 years depending on line | 1 year | Not covered |
Registration
Register at stiebel-eltron-usa.com within 90 days of install. Without registration, warranty defaults to manufacture date. Have your serial number ready (label on the side of the unit).
What voids the Stiebel Eltron warranty
- Improper electrical install — undersized breaker or wire gauge, missed disconnect
- Insufficient water flow on Tempra Plus — installation without inlet filter, debris damaging heat exchanger
- Hard water without descaling — annual descaling required in hard water
- Wrong supply voltage — Mini and SHC are 120V; DHC and Tempra are 240V. Wrong voltage destroys the unit
- Use beyond rated water hardness — Stiebel recommends water softener above 7 gpg
- Commercial use of residential-rated units — kicks warranty down to commercial 1-3 year
Warranty claims process
- Call Stiebel Eltron tech support: 1-800-582-8423
- Provide model, serial, install date, and symptom description
- Tech support diagnoses by phone first — many issues resolve without dispatch (sensor cleaning, breaker reset, descale)
- If diagnosis confirms covered part, Stiebel ships replacement
- Homeowner is responsible for install labor — typical $150-400 plumber/electrician charge for swap
- Send the defective part back per RMA instructions (Stiebel covers return shipping on covered claims)
Compared to US-market electric tankless warranties
| Brand | Heat Exchanger | Parts | Labor |
|---|---|---|---|
| Stiebel Eltron Tempra Plus | 7 years | 3 years | Not covered |
| Rheem RTEX-29 | 5 years | 1 year | Not covered |
| EcoSmart ECO 27 | Lifetime (residential) | 5 years | Not covered |
| Eemax HA series | 5 years | 1 year | Not covered |
EcoSmart\'s lifetime exchanger warranty is the longest paper warranty in the category. Stiebel Eltron\'s 7-year is mid-pack — but the field-reported reliability of Tempra Plus is widely regarded as best-in-class, making the moderate paper warranty less critical.
Bottom line
Register inside 90 days. Tempra Plus 7-year heat exchanger and Accelera 10-year tank are the headline warranties. Labor exclusion is standard for the segment. Tech support quality is excellent — direct factory access through US headquarters in Massachusetts.