If your furnace isn’t turning on, before you reach out to your Monroe Heating & Air professionals in a panic, remember that there are several common issues that may be causing your heating system to malfunction. To assist you, here is a straightforward troubleshooting list to help you identify the problem and take initial steps toward resolution.
Step One When Your Furnace Is Not Turning On: Check the Power Source
The first thing you should do when troubleshooting a problem is to check the power source. After all, “With great power, come great responsibility,” … or so they say.
Jokes aside, there are two main power sources you may need to check depending on what type of furnace you have. These are the circuit breaker or the gas or oil supply.
Consider the Circuit Breaker: If your furnace operates on electricity, it is important to inspect the circuit breaker. The circuit breaker for your furnace may have tripped, resulting in a loss of power to your heating system. Therefore, please examine your electrical panel and look for any switches that are in the “off” position or are positioned between “on” and “off.” It is not uncommon for a breaker switch to appear to be in the “on” position while actually being in the middle, which means it is turned “off.”
To resolve this issue, you should reset any tripped circuit breakers by fully flipping them to the “off” position and then back to “on.” However, if the breaker trips again, it may indicate an underlying electrical problem that requires the expertise of a professional. Additionally, it’s important to note that circuit breakers can wear out over time. If this issue persists, consulting with a professional to determine whether circuit breaker repair or replacement is the best course of action is advisable.
Consider the Fuel Supply: For furnaces that operate on fuel, it’s essential to ensure a consistent fuel supply for proper functioning. Any disruptions, such as a closed valve or an empty oil tank, can hinder your furnace from starting. While you may safely check that the gas valve is correctly positioned, if you have concerns regarding gas pressure, we recommend consulting a professional.
Step Two: When Your Furnace Is Not Turning On: Check the Thermostat
Next, let’s try checking the thermostat. After all, it functions as the command center for your HVAC system. So, if your furnace isn’t turning on, the solution might be an easy fix with the thermostat. Inspect your thermostat by confirming that your thermostat is set to “heat” and that the temperature setting is higher than the current room temperature, so that it gives your heating system a chance to rise to the temperature level at which you set.
At times, the thermostat may not function properly. This can occur. It is advisable to check the batteries and replace them if necessary, depending on your thermostat model. If your thermostat continues to be unresponsive, it may indicate the need for an HVAC technician to evaluate it for a proper diagnosis.
Step Three When Your Furnace Is Not Turning On: Check the Air Filters
Have you checked your HVAC system’s air filters? It may seem minor, but a clogged air filter can significantly impact your furnace’s performance. When the air filter becomes dirty and filled with dust and other airborne contaminants, it restricts airflow, leading to overheating and automatic shutdown for safety. Therefore, if you haven’t resolved the issue yet, inspecting your air filters is a wise decision. Regular maintenance ensures optimal functionality and longevity of your heating system, reflecting our commitment to providing comprehensive home services. Don’t hesitate to reach out for professional assistance to ensure your HVAC system operates at its best.
If the filter is dirty, simply replace it with a new one. Bear in mind that regularly changing the air filters is highly recommended—ideally this task should be completed every 1-3 months as it can improve your HVAC system’s efficiency and prolong its lifespan.
Step Four When Your Furnace Is Not Turning On: Check the Ducts
Did you know that blocked or obstructed ducts can also prevent your furnace from working correctly? When airflow is impeded, it can serve as a signal to your furnace that something is awry, in which case, it will respond and shut down. For example, if any objects have fallen into the ductwork, this can launch some furnaces into safety mode where they won’t turn on.
Certain furnaces are equipped with a safety mechanism that triggers this response to prevent carbon monoxide poisoning in the home. While specific conditions must be met for this scenario to arise, prioritizing safety is crucial. Therefore, addressing any obstructions promptly is always the most prudent course of action.
Step Five When Your Furnace Is Not Turning On: Check the Drain Pan
Modern furnaces are equipped with several safety features. For example, when a drain pan accumulates an excessive amount of moisture, it may activate a safety switch that halts the furnace’s operation. If this issue persists, it is advisable to locate the drain pan—typically situated beneath the furnace—and carefully empty it if it is filled with water. On the same note, if you have noticed that the drain pan fills up frequently, making this a repeated issue, this could indicate a problem with your HVAC system’s drainage…in which case, it’s time to give us a call.
What Is Next?
Dealing with a furnace that won’t turn on can be frustrating, but typically, this particular furnace issue can be resolved with the troubleshooting steps mentioned above. By checking the circuit breaker, thermostat, air filter, ducts, drain pan, pilot light, and fuel supply, you can often identify and resolve the problem yourself.
If those solutions do not resolve your furnace issues, remember that your Monroe Heating & Air team is always available to assist you. With our expertise in furnace repair and maintenance, we are fully equipped to restore your furnace to optimal functioning promptly.
Your comfort and safety are our top priorities, and at times, seeking expert assistance is the most effective solution. Please feel free to reach out to us. You can contact Monroe Heating & Air today at (513) 540-4890 or schedule an appointment online now by clicking here!
