Coleman Evcon Furnace Troubleshooting: Quick Fixes

To troubleshoot a Coleman Evcon furnace, check the pilot light, clean the flame sensor, and ensure proper airflow through clean filters. Issues may also arise from a faulty thermostat setting or a dirty flame rod causing the burner to go out prematurely.

In cases where the furnace fails to turn on, verify the gas line is open and the pilot light is functioning correctly. By following these steps, you can address common problems and potentially resolve issues with your Coleman Evcon furnace efficiently.

Remember to prioritize safety when inspecting and troubleshooting any furnace-related concerns.


Introduction To Coleman Evcon Furnace Troubleshooting

Having trouble with your Coleman Evcon furnace? If your furnace isn’t providing enough heat or isn’t working at all, you can troubleshoot the issue by checking the pilot light, testing the pressure switch, and resetting the control board. Ensure proper maintenance and seek professional help if needed.

Coleman Evcon furnaces are renowned for their reliability, but occasional issues may arise. Troubleshooting these problems can help restore your furnace’s functionality efficiently. Understanding common problems and having the right tools is crucial for effective troubleshooting.

Identifying Common Issues

Common issues with Coleman Evcon furnaces include ignition problems, malfunctioning thermostats, and issues with the pilot light. Identifying these issues promptly is essential to prevent further damage and ensure optimal furnace performance.

Tools Needed For Troubleshooting

  • Multimeter: Essential for checking electrical components.
  • Flashlight: Helps illuminate dark areas for inspection.
  • Screwdrivers: Required for accessing and removing components.
  • Cleaning tools: Used to remove dirt and debris from critical parts.

Initial Checks Before Deep Troubleshooting

Before delving deep into troubleshooting your Coleman Evcon furnace, it’s important to perform some initial checks to make sure that the root of the problem is identified. Here are some things you can do to ensure a smooth and efficient troubleshooting process:

Verifying Power Supply And Settings

One of the first things you should check is the power supply and settings of your furnace. Ensure that the power is on and that your thermostat is set to the appropriate temperature and mode (heat). Check the circuit breaker and fuse to see if they have tripped or blown. If they have, reset the breaker or replace the fuse.

You can also check the wiring and connections to ensure that they are secure and not damaged. Loose or damaged wiring can prevent your furnace from functioning properly.

Assessing The Thermostat And Gas Line

Another thing you can do is assess your thermostat and gas line. Check the batteries in your thermostat and replace them if necessary. Ensure that the thermostat is set to the appropriate temperature and mode (heat).

Check the gas line to ensure that it is open and not obstructed. If you suspect that there is a gas leak, immediately turn off the gas supply and call a professional to inspect and repair the problem.

If you have performed these initial checks and your Coleman Evcon furnace is still not functioning properly, it’s time to move on to deeper troubleshooting methods. Remember to always prioritize safety and consult a professional if you are uncertain about any aspect of the troubleshooting process.

No Heat Or Insufficient Heating

If you are experiencing no heat or insufficient heating from your Coleman Evcon furnace, several troubleshooting steps can help identify and resolve the issue. In this section, we will address common problems and their solutions to ensure your furnace operates efficiently.

Cleaning The Flame Sensor

A dirty or malfunctioning flame sensor can cause the furnace to produce insufficient heat or fail to ignite. To clean the flame sensor, follow these steps:

  • Turn off the power to the furnace.
  • Locate the flame sensor, typically positioned near the burner assembly.
  • Remove the flame sensor carefully and clean it using fine-grit sandpaper to remove any buildup or residue.
  • Reinstall the flame sensor and restore power to the furnace.

Checking And Replacing Air Filters

Dirty or clogged air filters can restrict airflow, leading to insufficient heating. To check and replace the air filters:

  • Locate the air filter housing, usually near the return air duct or the furnace itself.
  • Inspect the filter for dirt, dust, or debris accumulation.
  • If the filter is dirty, replace it with a new, clean filter suitable for your furnace model.
  • Regularly check and replace the air filters every 1-3 months to maintain proper airflow and heating efficiency.

By regularly cleaning the flame sensor and ensuring clean air filters, you can address common causes of no heat or insufficient heating in your Coleman Evcon furnace, helping to maintain its optimal performance.

Furnace Fails To Start

If your Coleman Evcon furnace fails to start, it can be frustrating and uncomfortable, especially during the colder months. However, troubleshooting the issue can often lead to a quick and effective solution, allowing you to restore warmth and comfort to your home. In this section, we will explore some common troubleshooting steps to help you address the issue of a furnace that fails to start.

Pilot Light And Ignition Process

One common reason for a furnace failing to start is a problem with the pilot light or ignition process. The pilot light is a small, constantly burning flame that ignites the gas in the furnace to produce heat. If the pilot light is out or the ignition process is faulty, the furnace will fail to start.

Evaluating The Electrical Connections

Another crucial aspect to consider when troubleshooting a furnace that fails to start is evaluating the electrical connections. Faulty or loose electrical connections can prevent the furnace from receiving the necessary power to initiate the heating process. By inspecting and ensuring the integrity of the electrical connections, you can potentially identify and resolve the issue causing the furnace to fail to start.

Understanding Error Codes

Understanding error codes is crucial when troubleshooting your Coleman Evcon furnace. Error codes are the furnace’s way of communicating specific issues that may be affecting its performance. By understanding these error codes, you can quickly identify and address the problem, ensuring that your furnace operates efficiently.

Interpreting Blink Patterns

When troubleshooting your Coleman Evcon furnace, pay attention to the blink patterns on the control board. These blink patterns correspond to specific error codes that can help you diagnose the issue. Refer to the furnace’s manual to interpret the blink patterns and identify the corresponding error codes.

Reset Procedures For Specific Error Codes

Once you have identified the error code, you can proceed with the reset procedures to address the specific issue. Each error code may require a different reset procedure, so it’s essential to follow the manufacturer’s guidelines for resetting the furnace. Refer to the manual or contact a professional for assistance if needed.

Blower Issues In Mobile Home Models

Mobile home models of Coleman Evcon furnaces can experience various blower issues that affect the heating efficiency. Troubleshooting and fixing these blower problems is crucial to ensure optimal performance and comfort in your mobile home.

Troubleshooting The Blower Motor

When troubleshooting the blower motor in Coleman Evcon mobile home models, it’s essential to check for common issues that might impede its functionality. These issues can include electrical problems, motor malfunctions, or airflow obstructions.

Fixes For Common Blower Problems

If you encounter blower problems in your Coleman Evcon furnace, there are several fixes you can implement to address these issues. These fixes may involve cleaning the blower assembly, checking for loose electrical connections, or replacing worn-out components.

Advanced Diagnostics

For effective Coleman Evcon furnace troubleshooting, utilize advanced diagnostics to pinpoint issues like a faulty flame sensor or dirty filters preventing ignition and airflow. Resolve common problems such as burner issues or blower malfunctions with expert repair guidance.

Advanced Diagnostics is an important aspect of troubleshooting a Coleman Evcon furnace. It involves a series of tests and inspections to identify the root cause of the problem. Two crucial components that require inspection during advanced diagnostics are the pressure switch and the control board. In this section, we will discuss Pressure Switch Tests, Limit Switch and Control Board Inspections.

Pressure Switch Tests

A pressure switch is a safety device that prevents the furnace from operating if there is not enough airflow. A malfunctioning pressure switch can lead to a variety of issues, including a furnace that won’t start, won’t stay on, or will cycle on and off repeatedly. To test the pressure switch, a multimeter is required to check for continuity. The pressure switch should be closed when the furnace is operating and open when the furnace is not in operation.

Limit Switch And Control Board Inspections

The limit switch is another safety device that prevents the furnace from overheating. If the furnace gets too hot, the limit switch will shut off the burners and the blower motor. A malfunctioning limit switch can result in a furnace that won’t start or will cycle on and off. To test the limit switch, a multimeter is required to check for continuity. The limit switch should be closed when the furnace is operating and open when the furnace is not in operation.

The control board is the brain of the furnace, and it controls all of the furnace’s functions. If the control board is faulty, it can lead to a variety of problems, including a furnace that won’t start or won’t stay on. During advanced diagnostics, the control board should be inspected for any signs of damage or wear and tear. The wiring should also be checked for any loose connections or broken wires.

In conclusion, advanced diagnostics is essential for troubleshooting a Coleman Evcon furnace. Pressure switch tests, limit switch and control board inspections are critical components of advanced diagnostics that can help identify the root cause of the problem. By following these steps, homeowners can save money on costly repairs and ensure their furnace is functioning properly.

Maintenance Tips To Prevent Future Issues

Regular maintenance is key to ensuring your Coleman Evcon furnace operates efficiently and reliably. By following these maintenance tips, you can prevent future issues and extend the lifespan of your furnace.

Regular Cleaning And Care

  • Replace filters regularly: Clogged filters can restrict airflow and strain the furnace, leading to malfunctions.
  • Clean blower and motor: Dust and debris can accumulate, affecting the efficiency of the blower motor.
  • Inspect vents and ducts: Ensure they are clear of obstructions to maintain proper airflow.

Annual Professional Inspections

  • Schedule regular maintenance: Professional inspections can identify potential issues before they escalate.
  • Check electrical connections: Loose connections can cause safety hazards and operational problems.
  • Calibrate thermostat: Ensure accurate temperature control for optimal performance.

Frequently Asked Questions

How Do You Troubleshoot A Coleman Mobile Home Furnace?

To troubleshoot a Coleman mobile home furnace, check the pilot light, clean the flame sensor, and inspect the filter for cleanliness.

Why Is My Coleman Furnace Not Igniting?

Your Coleman furnace may not ignite due to a faulty flame sensor. A dirty sensor or lack of flame detection can trigger the control board to shut off gas flow. Regular cleaning and maintenance can help resolve this issue.

Why Is My Furnace Not Igniting Or Blowing Air?

Check if the filter is clean. Dirty filters reduce airflow, causing furnace ignition and air blow issues. Also, verify thermostat settings, gas line, and pilot light functionality.

What Do Three Blinks On A Coleman Furnace Mean?

Three blinks on a Coleman furnace indicate a pressure switch stuck open. This issue can be caused by blocked vents or a faulty pressure switch. It’s recommended to check for any obstructions and ensure proper functioning of the pressure switch.


Troubleshooting your Coleman Evcon furnace can be manageable with proper guidance. Check the pilot light, clean the flame sensor, and ensure proper airflow for optimal performance. Remember to consult experts for complex issues and keep your furnace well-maintained for efficient heating.

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