The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →If your Stiebel Eltron Tempra Plus has no hot water, weak flow, lukewarm water, or a display code, start with the symptom-specific checks below. The manufacturer’s current Tempra Trend and Tempra Plus installation manual lists several possible causes; checks that involve opening the heater, electrical testing, or internal components should be left to a qualified professional. If basic checks do not solve the problem, contact Stiebel Eltron technical support before removing the unit from the wall.
Why is my Tempra Plus not producing hot water?
The manufacturer’s installation manual lists several possible causes: a tripped or switched-off breaker, flow below the heater’s activation threshold, a clogged filter screen or fixture, a blocked or non-spinning flow sensor, or reversed plumbing. Start with checks that do not require opening the unit.
- Check the associated circuit breakers. Confirm that the breakers supplying the heater are on. If a breaker trips again after being reset, stop and contact a qualified electrician or technical support rather than repeatedly resetting it.
- Check for restricted flow at the fixture. If the flow is weak, clean the faucet aerator or shower head. A clogged aerator or shower head can restrict flow enough to affect operation.
- Clean the heater’s filter screen. Follow the current manual’s guidance for accessing and cleaning the screen. Do not open the heater unless you are qualified and following the manufacturer’s safety procedure.
- Have the plumbing direction verified if the issue persists. The manual specifies cold-water entry on the right and hot-water exit on the left. A flow sensor that is clogged or does not spin is another possible cause, but diagnosis or repair inside the unit should go to a qualified technician.
These checks are based on the Stiebel Eltron Tempra Trend and Tempra Plus installation manual. A low activation flow, internal flow-sensor fault, or plumbing problem may need professional diagnosis.
Why is the hot-water flow restricted?
Low hot-water volume can result from a clogged filter screen or scale buildup on the heating elements. Clean the filter screen according to the manual. For suspected scale, the manual recommends descaling with a descaling solution; use the solution as directed and follow applicable service guidance. If you are unsure how to service the unit safely, contact a qualified technician.
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- On demand a continuous and unlimited supply of hot water
- Sleek design saves space and no venting required, It also features two different temperature memory presets, making it easy to adjust for personalized needs.
- Requires hard-wired 240 or 208-volt electric service, with a maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts
- Requires 3 separate dedicated 40 amp breakers with 8 gauge copper wiring, and a minimum of 200 amp total service to the residence
Why is my Tempra Plus water not hot enough?
The manual identifies excessive water flow, low voltage, and a tripped safety thermal cutout as possible causes of insufficiently hot water.
- Flow may be too high. Reduce the water flow and observe the heater’s front power light. The manual says to reduce flow until the power light stops blinking when excessive flow is the cause.
- Supply voltage may be low or incorrect. Voltage measurement and any wiring or supply correction are electrical work for a qualified professional.
- The safety thermal cutout may have tripped. It protects against excessively hot water. Before any reset procedure, turn off all circuit breakers connected to the heater. Do not attempt a reset with power on. If the cutout trips repeatedly, stop resetting it and contact technical support; repeated trips may point to a technical fault.
What does a Tempra Plus error code mean?
Use the code table in the current installation manual for the exact Tempra Plus model or generation installed. The manual describes error reporting for sensor and control issues, and some faults require technical support. Do not infer a code’s meaning from an older Tempra manual or from an unverified list; consult the matching manual and follow its stated next step.
Rank #2
- CONTINOUS FLOW – Hot showers will never be interrupted again. Enjoy continuous, on-demand hot water with an unlimited supply, when you want it without wasting any energy when not needed
- SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation
- SILENT OPERATION – One electronic switch will activate the hot water heater and it’s noise free while in use. Digital temperature display is easy to read, while the interior solid copper heating system does all the power work
- TEMPRA 24 TREND – This specific model is 24kW, 240V, requires a min recommended electric service of 150 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
- WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase
Stiebel Eltron provides the installation manual and other product documents through its Tempra Plus product page. If the code table directs you to support, or the code remains after the manual’s permitted checks, contact the manufacturer rather than disassembling the heater.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When should I stop troubleshooting?
Stop and seek professional help if the problem requires internal access, electrical testing or wiring work; if the flow sensor may be blocked or malfunctioning; if the thermal cutout trips again; or if a fault code calls for service. Stiebel Eltron asks users to contact technical support before removing the unit from the wall. Have the heater’s exact model information and the observed symptom or display code ready when you call.
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Quick Recap
Rank #3
- CONTINUOUS FLOW – Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
- SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
- EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
- TEMPRA 15 PLUS – This specific model is 14.4kW, 240V, requires a min recommended electric service of 100 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
- WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
