Water heater high temperature shutdown

Water heater high temperature shutdown. Hot water is a requirement for everyone, especially in winter. But on a fine winter’s evening, you come home and go to seek some warm water to freshen yourself, but you find no warm water in the bath.

The first step must be going to the water heater. It might be possible that you haven’t flicked it On. But when you try to turn the knob on, you suspect the LED light blinks four times.

So, if you are facing the same situation, you need to know that the following situation indicates the issue of shutting down the device due to high temperature.

If you want to fix the issue, you need to diagnose the issue that triggers your water heater for excessive temperature, and consequently, it turns off.

Water heater high temperature shutdown

If your water heater is experiencing a shutdown issue due to high temperature, you need to inspect its relevant components that you can blame for the excessive temperature.Water heater high temperature

A problematic thermocouple, a faulty thermostat, and a defective gas valve can cause the issues of high temperature in a water heater.

But calm down. By following our guidelines, you can fix the issue of shutting down arise due to high temperatures. So let’s start troubleshooting your water heater high-temperature problem.

Components That Might Be The Culprit

If you want to run your water heater excellently, you need to check the following things mentioned below.

The Pressure Valve Buildup

If your water heater is facing the issue of high temperature, then there might be an issue with the pressure valve. The steam produced by the hot water can turn into buildup in the unit, possibly leading to a high-temperature issue.

The unit detects the excessive temperature due to hot clogging in the system, and the pressure valve prevents the gas from evading the radiator.

A clogged valve can’t give the desired performance and allows the unit to go through the high-temperature shutdown feature. So, if the pressure valve becomes blocked, it will rises the temperature of the hot water tank and may turn off.

So, to fix the issue, you need to unclog the pressure valve so it can work again efficiently. It would be better to contact a professional for fixing.

Problematic Thermostat

If your water heater is appearing issue of overheating, then it might be possible that the thermostat of your hot water unit becomes faulty.

The thermostat is an essential component responsible for the heating element to run or stop a heating cycle. So, you can say the thermostat monitors the water heater temperature.

But if somehow the thermostat of the water heater becomes faulty, it cannot give commands to the heating element to stop the heat-producing cycle. As a consequence, your water heater faces the high-temperature shutdown mode.

The issue can be resolved if you examine the thermostat and if you find it faulty, replace it with a new one according to your water heater’s brand and model number.

Defective Thermocouple

Two things related to thermocouples may push your water unit into high-temperature shutdown settings. So inspect the thermocouple to diagnose the issue.

The first thing that requires your attention is inspecting whether the thermocouple is free from dust or debris buildup. If it has accumulated debris, don’t expect an efficient performance from your water heater.

So, before thinking about any other solution, you need to clean your thermocouple. It can also fix the issue. But if the overheating issue persists, it might be possible that the water heater’s thermocouple requires replacement.

If the water heater requires a replacement, you need to purchase the thermocouple compatible with your water heater so that it can start working smoothly without creating any other issues.

Unsecure Cable Connection

Another problem that can be the culprit is an unsecured wired connection with the circuit board. So, you can resolve the issue by restoring the wire connections.

So to fix the issue, you reset the circuit by detaching and then reattaching the wires. So first, you need to unfasten the wire of the ignitor.

Now, you need to remove the cord of the double teminals attached to the heating sensors. Please remove the cover by unfastening the bolts, unfolding the hooks, and removing them.

Now, access the circuit board and unfasten the double-wire attachments. Wait for 20 seconds to reset the circuit. After passing the specific period, you must attach everything back to its spots.

Turn the water heater on and examine its performance. We hope the following steps will help you fix the overheating shutdown mode issue.

Issue of Wear & Tear Valve or Solenoid

While other components can create the issue and require attention for diagnosing the issue, you also need to check the gas valve and solenoid in the water heater gas valve.

So to sort out the issue of excessive temperature and restore the performance of your water heater, you need to inspect the gas valve and the solenoid. If the following components are faulty, make a new installation.

Steps To Reset High Temperature Shutdown

Here are the steps to reset your water heater. Sometimes resetting an appliance can fix the issue.

Follow the step to reset your water heater the steps mentioned below.

  • Proceed with the procedure with a turnoff mode.
  • Switch the knob of the water heater to the pilot.
  • Push down the button and rapidly hit the striker.
  • Examine the led light to see whether it blinks four times or not.
  • Make certain to knock the striker while examining.
  • When you see the 4 blinks, immediately turn the knob towards the high max level.
  • Wait for 10 seconds and set the knot at a high max level.
  • Switch the knob to the pilot to successfully reset the high temperature shut down.


We hope the following article will help you to know the causes of making your water heater’s high-temperature shutdown issue. You need to follow the guideline accurately to inspect the issue. Replacing anything requires professionalism, so don’t hesitate to contact a pro if you are nervous.

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