How to fix your mr. heater that won’t stay lit: the quick and easy way!

Experiencing issues with your Mr. Heater refusing to stay lit can be frustrating, especially during colder months. This blog post will delve into the potential causes and provide step-by-step instructions on how to fix a Mr. Heater that won’t stay lit, ensuring a warm and comfortable environment.

Causes of a Mr. Heater Not Staying Lit

• Insufficient Propane: Ensure the propane tank is full and connected securely.
• Dirty Thermocouple: The thermocouple detects the presence of a flame and sends a signal to the gas valve to keep the heater lit. A dirty or faulty thermocouple can cause the heater to shut off.
• Faulty Gas Valve: The gas valve controls the flow of propane to the burner. A malfunctioning gas valve can prevent the heater from staying lit.
• Clogged Burner: Dirt, debris, or insect nests can clog the burner, blocking the flow of propane and causing the heater to extinguish.
• Oxygen Deprivation: A lack of sufficient oxygen can cause the heater to struggle to stay lit.
• Altitude: At higher altitudes, the air is less dense, which can affect the heater’s ability to ignite and stay lit.
• Wind: Strong winds can blow out the flame or disrupt the oxygen supply.

Troubleshooting and Repair

1. Check the Propane Tank

• Verify that the propane tank is full and securely connected to the heater.
• If the tank is empty, replace it with a full one.
• Ensure the hose and connections are free of leaks or damage.

2. Clean the Thermocouple

• Locate the thermocouple, which is usually a thin metal rod near the burner.
• Use a fine-grit sandpaper or steel wool to gently clean the tip of the thermocouple.
• Avoid touching the thermocouple with your bare hands, as oils can interfere with its operation.

3. Inspect the Gas Valve

• Ensure the gas valve is fully open.
• If the valve appears faulty, replace it with a new one.

4. Clean the Burner

• Remove the burner from the heater.
• Use a soft brush or compressed air to remove any dirt, debris, or nests.
• Inspect the burner for any blockages or damage.

5. Ensure Sufficient Oxygen

• Place the heater in a well-ventilated area with plenty of fresh air.
• Avoid placing the heater in enclosed spaces or near curtains or other flammable materials.

6. Adjust for Altitude

• If you are at a high altitude, you may need to adjust the air-fuel mixture on the heater.
• Refer to the manufacturer’s instructions for specific adjustment procedures.

7. Protect from Wind

• Position the heater in a sheltered location away from strong winds.
• Consider using a wind screen or other barrier to protect the heater from the elements.

Safety Precautions

• Always follow the manufacturer’s instructions and safety guidelines.
• Never attempt to repair the heater if you are not qualified or comfortable doing so.
• Ensure the heater is turned off and cooled before performing any maintenance or repairs.
• Use caution when handling propane and keep the tank away from heat sources.

Questions You May Have

Q: Why does my Mr. Heater keep shutting off after a few minutes?

A: It could be due to a dirty thermocouple, a faulty gas valve, or insufficient oxygen.

Q: How do I know if the thermocouple is bad?

A: A faulty thermocouple will typically be discolored or have a buildup of carbon.

Q: Can I use my Mr. Heater indoors?

A: No, Mr. Heaters are designed for outdoor use only. Using them indoors can create a dangerous buildup of carbon monoxide.