ThermoFlow Elex Compact Series

Questions and Answers

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Matthew DavisAug 17, 2025
Why is my ThermoFlow Elex Compact heating, but the water is not hot enough?
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  Raymond HillAug 17, 2025
  There are several reasons why your ThermoFlow Water Heater might not be producing hot enough water: * The user temperature setting may be too low - try increasing it. * The flow rate might be too high; consider installing a flow regulator to reduce it. * If it’s a new installation, the wiring could be incorrect; have your electrician double-check it. * The voltage may be less than 380 volts for 3-Phase models or less than 220 volts for Single-Phase models. In this case, you may need to upgrade to a larger input heater. * You might be mixing too much cold water; adjust your faucet's anti-scald feature to reduce cold water mixing.
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Juan MichaelAug 20, 2025
What to do if my ThermoFlow Elex Compact Water Heater display lights up but shows no temperature and isn't heating?
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  Andrew HaynesAug 20, 2025
  If your ThermoFlow Water Heater's display lights up but shows no temperature and isn't heating, it could be due to several reasons: * The flow rate might be too low. Your water heater needs a flow rate of approximately 2.2L/min / 2.5L/min to activate. Increase the flow rate or check the filter mat inside the inlet connector. * Air bubbles might be trapped. Turn on the unit and open the hot water tap for about 20 seconds to purge them. * The flow sensor might be blocked. Try uninstalling and cleaning it. * The connector between the flow sensor and the main board might be loose. Unplug and replug it.
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stephen17Aug 22, 2025
How to fix a ThermoFlow Water Heater when it's not heating and the display is off?
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  Andrew TaylorAug 22, 2025
  If your ThermoFlow Water Heater isn't heating and the digital display is off, it could be due to no power or incorrect wiring. First, ensure the breakers at your main electrical panel are turned ON. It's also possible you have a faulty breaker or that the unit is wired incorrectly. You may need to have an electrician check the wiring.
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Regina WolfAug 25, 2025
What to do if ThermoFlow Elex Compact is not heating but the display is on?
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  Alyssa StokesAug 26, 2025
  If your ThermoFlow Water Heater's digital display is on, but the water isn't heating, the issue might be: * Flow rate is too low / water pressure is too low. Your water heater needs approximately 0.6 GPM (2.5 LPM) to activate. Increase the flow rate or check the filter mat inside the inlet connector. * The air bubbles in the water heater have not been purged out. Make sure the breakers at the main electrical panel are ON, turn on the unit, and open the hot water tap for about 20 seconds.
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joneskaraAug 27, 2025
How to troubleshoot ThermoFlow Water Heater when the digital display doesn't light up?
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  Bruce PhamAug 27, 2025
  If your ThermoFlow Water Heater's digital display isn't lighting up and the water isn't heating, first, ensure the breakers at the main electrical panel are ON. You might have a faulty breaker or the unit could be wired incorrectly.
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bestdavidAug 30, 2025
Why is the water temperature at the faucet different from my ThermoFlow Elex Compact Water Heater setting?
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  Rebecca FranklinAug 30, 2025
  The water temperature at the faucet differing from your ThermoFlow Water Heater setting can be due to a few reasons: * Your faucet might have an anti-scald feature or tempering valve that mixes cold water, even on full hot. Adjust the valve to reduce cold water mixing. You can compensate for this by increasing the setting on your water heater if you need/want hotter water. * Heat loss can occur due to long pipe runs, especially if the pipes are cold. You can compensate for this by increasing the setting on your water heater if you need/want hotter water. * If the water temperature at the faucet is too hot, check if the flow is too little or the set point temperature is too high.
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Kevin CooperSep 2, 2025
How to fix low flow rate on ThermoFlow Water Heater?
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  Amy GonzalezSep 2, 2025
  If you're experiencing a low flow rate with your ThermoFlow Water Heater, the filter mat inside the inlet connector or the pipe might be blocked. Check and clean the filter mat inside the inlet connector to resolve this issue.
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vincent42Sep 7, 2025
Why is the water temperature different from my ThermoFlow Elex Compact Water Heater setting?
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  jordandavidSep 7, 2025
  The water temperature at the faucet might differ from your ThermoFlow Water Heater setting due to: * An Anti-Scald pressure/balancing valve or tempering valve. These may automatically mix cold water, even on full hot. Adjust these devices to reduce cold water mixing. You can also increase the water heater setting to compensate. * Thermal loss due to a long pipe run. Heat loss can occur as hot water travels, especially over long distances or through cold pipes. Increase the water heater setting to compensate. * Water temperature at the faucet is too hot. Check your flow for too little flow, set point temperature is too high.
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Jason GibsonSep 12, 2025
How to increase the flow rate on my ThermoFlow Elex Compact?
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  Gregory JohnsonSep 12, 2025
  A low flow rate in your ThermoFlow Water Heater may be due to a blockage. Check and clean the filter mat inside the inlet connector. Also, inspect the pipe for any blockages.
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Frederick HoffmanSep 13, 2025
What does error code 'E2' mean on my ThermoFlow Elex Compact?
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  Brittany TurnerSep 13, 2025
  If your ThermoFlow Water Heater's LCD display shows “E2”, it indicates an internal part failure. Please call for your local service.

ThermoFlow Elex Compact Series Specifications

General

Type	Electric Tankless Water Heater
Control Type	Digital
Power	18 kW
Voltage	220-240V
Amperage	75 A
Temperature Range	85°F - 140°F
Safety Features	Overheat Protection
Power Rating	18 kW
Water Pressure	150 PSI
Maximum Water Temperature	140°F