Honeywell gas control valve troubleshooting for Water Heaters (2023)

Are you facing problems with your Honeywell gas control valve? Discover helpful tips and information to resolve common issues with this valve. While we primarily offer local water heater services in the Kansas City area, we aim to assist you in troubleshooting and resolving your water heater problems. Please note that we do not provide technical support over the phone.

Honeywell gas control valve troubleshooting for Water Heaters (1)

Common Issues with Honeywell Gas Control Valve:

The Honeywell gas control valve is known for occasional issues reported online. However, it’s important to note that these problems are often related to improper installation or environmental factors. The government’s new regulations for backdrafting have led to a lower threshold, causing some units to encounter problems when installed in unsuitable environments.

Installation Tips for Honeywell Gas Control Valve:

To ensure a proper installation and avoid potential issues with the Honeywell gas control valve, consider the following tips:

  1. Ventilation: The vent should have at least 12 inches of rise before the first elbow. If the unit is common vented with a connector rise of less than 3 feet, it’s recommended to use a 4-inch vent instead of a 3-inch vent.

Understanding Honeywell Gas Control Valve LED Indicators:

The LED indicator on the Honeywell gas control valve can help troubleshoot specific issues. Here’s a breakdown of the LED indicators and their meanings:

  • No Flash: Pilot not lit or insufficient power.
  • 1 Flash: Normal operation.
  • 2 Flashes: Thermopile low voltage. Check wiring connections and consider replacing the thermopile.
  • 4 Flashes: Temperature exceeded. Consider keeping the thermostat temperature down to prevent exceeding the limit.
  • 5 Flashes: Sensor failure. The gas control valve must be replaced.
  • 7 Flashes: Gas control valve failure. Replacement is required.
  • 8 Flashes: Power off failure. Reset the gas control valve or consider replacing it if the pilot remains lit.

Steps to Resolve Honeywell Gas Control Valve Issues:

  1. 2 Flash Code: If there is insufficient power to the gas control valve/thermostat, check all wiring connections. If the problem persists, replace the thermopile. Note that the entire pilot assembly must be replaced when replacing the thermopile.
  2. 4 Flash Code: If the temperature has exceeded the limit, the gas valve needs to be replaced. This issue is often attributed to sediment in the tank. Adjusting the thermostat temperature can help prevent exceeding the limit.
  3. 5 Flash Code: A sensor failure indicates that the gas control valve requires replacement.
  4. 7 Flash Code: Overall failure of the gas valve, typically requiring replacement. If you encounter this code and have lukewarm water with the pilot still on, try increasing the temperature setting.
  5. 8 Flash Code: Reset the gas control valve by turning the gas control dial to “off” and letting it sit for one minute. If the pilot remains lit, the gas control valve needs to be replaced.

Seeking Professional Assistance:

If you have followed the troubleshooting steps provided above and are still experiencing issues with your Honeywell gas control valve, it’s advisable to consult a professional water heater technician. They possess the knowledge and expertise to accurately diagnose and address the problem.

Please note that the information shared here is a general guide and may not cover all scenarios. For personalized assistance and local service in the Kansas City area, feel free to contact KC Water Heaters. We prioritize customer satisfaction and are dedicated to providing exceptional water heater services.

Remember, for water heater concerns, installations, or repairs, KC Water Heaters is your trusted local expert in the Kansas City area. Contact us today and let us help you with your water heater needs.


Honeywell gas control valve troubleshooting for Water Heaters? ›

How Do I Know If My Gas Valve Is Bad on My Water Heater? A faulty gas control valve will cause your pilot light to go out or not stay lit after releasing the button. It might also cause the water to get too hot or the heat limiter to trip.

How do I know if my gas control valve is bad on my water heater? ›

How Do I Know If My Gas Valve Is Bad on My Water Heater? A faulty gas control valve will cause your pilot light to go out or not stay lit after releasing the button. It might also cause the water to get too hot or the heat limiter to trip.

Why is my Honeywell gas valve blinking 5 times? ›

Five flashes every three seconds indicates an internal sensor failure. Turn the gas control knob OFF, turn the gas supply valve OFF, and click on "Need More Help" below.

Why is my gas control valve not working? ›

There are several reasons this valve may stop working properly. The valve itself may have simply worn out or may be damaged due to basement seepage or submersion. Alternately, one of the electronic gas ignition components or a glitch in the safety circuit may be to blame.

How do you diagnose a bad gas valve? ›

Symptoms of a Malfunctioning Furnace Gas Valve
  1. No Heat. A malfunctioning furnace gas valve may impede your furnace's ability to perform the combustion process. ...
  2. Constant Furnace Cycling. Inadequate gas flow from the valve may cause your furnace to stay on for an extended period of time. ...
  3. Carbon Monoxide Alarm.
Dec 29, 2021

Is it the thermocouple or gas valve? ›

Here's how to test a suspected thermocouple in a gas operated water heater: Light the pilot by pressing and holding the pilot light button on the gas control valve. If you can't light the pilot, the problem most likely lies with the gas control valve or the gas flow itself, not the thermocouple.

Why is my water heater blinking every 3 seconds? ›

If the Status Light is flashing once every three seconds, the pilot light is lit and the gas control valve is working properly. Make sure the gas control valve is turned to "Hot" and wait for the water heater to heat back up. It may take several hours for the water to heat up.

Why is the status light on my Honeywell water heater blinking? ›

This water heater uses a thermopile to generate electricity needed to power the gas control valve. Once the pilot is lit, it may take up to 90 seconds for the thermopile to get hot enough to power the gas control valve. When that happens, the status light will blink once every three seconds indicating normal operation.

What does blinking light on gas water heater mean? ›

Four Reasons The Light On Your Water Heater is Blinking

A Thermostat Problem. The Pilot Light Is out. Empty Tank or Tank Won't Fill Up. Power or Electrical Issues.

What is the common problem in control valve? ›

Four common failures associated with control valves are found at a high frequency in poorly performing control loops. These are Dead band, Stiction, Positioner overshoot, Incorrect valve sizing and Nonlinear flow characteristic. Let's take a closer look at each of these problems.

How do you troubleshoot a control valve? ›

The first step is to visually check the control valve and all its accessories. Check for any air leakage or physical damage. If found any issues then correct them. Check the air supply from the air filter regulator (AFR) to the valve positioner or solenoid valve whichever is applicable.

Why do I have to reset my gas water heater? ›

Purpose of the Water Heater Reset Button

This is a safety feature and happens when there is an issue in the water heater such as a thermostat not working properly or a power surge. The reset button keeps the water from getting too hot in the unit.

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