Williams Wall Heater Troubleshooting - Common Problems and Solutions

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Last updated: 
March 26, 2018

People who live in studio apartments, compact living spaces or work in smaller offices often choose wall heaters. They are preferred because they produce a comfortable amount of heat, which is great for the situations we mentioned above. They keep small living or working zones warm, using up very little floor space. We all know how annoying it is when your wall heater stops working, right? Luckily, on the Williams website, you can find useful Williams wall heater troubleshooting steps. Here you have the steps you need to follow for the Williams wall heater troubleshooting process.

Williams white wall heater

Common Issues

  • The heater is not blowing warm air but either cold or cool. This can happen because of a dirty air filter or a leak in the duct system. You may not see it unless you go into your attic or crawl space. Check any pilot light issues to see if the gas valve is on. If not and you cannot light it, call a professional. There may also be not enough or not any fuel in the heater system.
  • The device will not stay on or lit. Some of the newer heating systems are electric and don’t have a pilot light. In this case, it might be that a sensor needs is dirty and needs to be cleaned off.
  • The heater will not turn off at all. It is possible that the switch is turned on auto instead of in the on position. If this is not the case, the thermostat or furnace may be broken. Replacing a thermostat can be a do-it-yourself task, but you may need to hire a professional to replace your furnace.
  • If none of these steps have fixed the problem, please contact a Williams wall heater troubleshooting professional for further instruction.

Tool You’ll Need for the Job

  • 8 to 12-inch adjustable wrenches – for removing the heater control knob
  • Philips Flat head screwdriver – for loosening the knob stem nuts. You will also need it for face plate mounting screws and removing the unit from the wall.
  • Clean rag – for cleaning off the dirt that might be on the sensor or on the ducts.

Don't any of these recommended tools or steps fix the problem with your wall heater? Please contact the Williams wall heater troubleshooting service.

Furnace Troubleshooting

  • The pilot will not stay lit even after following the lighting instructions. This could be from loose of dirty valve connections or a defective generator or gas valve.
  • No gas is going to the main burner – this could be from something as simple as the gas valve not in the on position or the furnace not plugged in. Also, a defective thermostat or valve could be the problem too.
  • The furnace is working but shuts off before heating up the room or is not producing enough heat – this could happen if the furnace you installed is too small for the area it is trying to heat or simply where you can find the thermostat.
  • The furnace is working but won’t shut off when it finally reaches the temperature desired – this can be from a defective thermostat or the thermostats wiring itself having an issue or a valve can't close.

For any questions or concerns about these issues with your furnace, please refer to the Williams wall heating troubleshooting.

Caution Notes

  • Please let the furnace come to a cool down before examining it to prevent burns.
  • Never open a flue so that you expel gases into another room, a fireplace or any part of the inside of a building.
  • Do not allow clothing or other flammable or combustible items on or around the furnace. If you are unsure about what is and is not safe around the furnace or heaters, please refer to the Williams wall heater troubleshooting.
  • It is best to wear your own protective gear, for example, gloves and safety glasses, so to help in avoiding any injury by possible sharp metal ends or if you are standing around the furnace as you are cutting or drilling a hole in wood or metal.
  • Another good way to prevent any damage is if you are working with wires, label all of them prior to disconnecting them if needed. If you are unsure about the proper wires to disconnect, please refer to the Williams wall heater troubleshooting.
  • It’s a good idea to set the thermostat to the lowest temperature while working on the furnace or heating system.
  • It's also a good idea to turn off all electric power to the heater while you are doing any adjustments to it.
  • It also helps to keep the burner and control compartment areas as clean as you can
  • In the case that you have a gas heater and you do smell gas first thing is to open all windows. Keep all appliances off, stay away from and do not touch any electrical switches. If you need to use your cell phone, step out of the house and do not use any landline phones while inside your house. If you happen to have a flame going such as in a fireplace, extinguish them. When outside with your cell phone, then call your gas company or if you do not have a cell phone available, please use a neighbor’s phone. The gas company may give you instructions but in case you cannot reach the gas company, call the fire department and the Williams wall heater troubleshooting to speak to a specialist immediately.


Even though wall heaters are very safe, always take into consideration that where you place your furniture is important. When it comes to a wall heater, it is best to keep them away from the outflow of heated air. That is really the only safety procedure one should consider when using a wall heater otherwise it has many excellent benefits.

With this, repairs are usually very minimal. However, if you do have questions or concerns about your wall heater and need some professional assistance, please contact the Williams wall heater troubleshooting service either by calling Williams or referring to their website for questions or instructions.

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