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We often hear homeowners ask, “Why is there a delay when my gas furnace comes on?” If you’ve noticed your furnace taking longer than usual to ignite, you might be experiencing what’s known as delayed ignition. This common furnace issue can range from a minor inconvenience to a serious safety hazard. In this post, we’ll break down the causes of delayed ignition, why it happens, and when you should call a professional for heating repair in Forsyth, GA.
What Is Delayed Ignition in a Gas Furnace?
Delayed ignition occurs when the gas in your furnace doesn’t ignite immediately when the burners receive fuel. Instead, the gas builds up before finally igniting, sometimes creating a small explosion or loud “boom.” This problem can lead to wear and tear on your furnace, inefficiency, and in extreme cases, damage to the heat exchanger or even safety risks.
Common Causes of Delayed Ignition
Several factors can cause a delay in your gas furnace’s ignition, including:
1. Dirty or Clogged Burners
Over time, your furnace’s burners can accumulate dust, dirt, and debris. When the burners are clogged, gas cannot flow properly, leading to delayed ignition. An HVAC professional can thoroughly clean the burners to resolve this issue.
2. Faulty Igniter or Pilot Light Issues
Most modern furnaces use an electronic igniter, while older systems rely on a standing pilot light. If the igniter fails or the pilot light is weak or out, the gas won’t ignite right away. Replacing a faulty igniter or reigniting the pilot light (if applicable) can fix this problem.
3. Gas Pressure Problems
If the gas pressure is too low, the burners may not receive enough fuel to ignite immediately. On the other hand, if the pressure is too high, it can cause an excessive buildup of gas before ignition. An HVAC technician can check and adjust your gas pressure to ensure optimal performance.
4. Blocked or Faulty Flame Sensor
The flame sensor detects whether a flame is present and shuts off the gas if it doesn’t sense one. If the sensor is dirty or malfunctioning, it can delay ignition or even prevent the furnace from starting altogether. Cleaning or replacing the flame sensor can help restore normal operation.
5. Wear and Tear on the Ignition System
As furnaces age, components such as the ignition system, gas valve, and burners experience natural wear and tear. Regular maintenance can catch these issues early, but if your system is old, it might be time for a replacement.
When Should You Call a Professional for Furnace Repairs?
While some minor furnace issues can be resolved with basic maintenance, delayed ignition is not something you should ignore. Here are signs that it’s time to call an HVAC professional:
- Loud booming or banging noises when the furnace starts
- Repeated ignition delays that don’t resolve after cleaning or maintenance
- Frequent furnace shutdowns due to ignition failure
- Gas smell coming from your furnace, which could indicate a gas leak
A professional HVAC technician can diagnose the root cause of delayed ignition and perform necessary repairs to keep your furnace running safely and efficiently.
If you’re experiencing delayed ignition with your gas furnace, don’t wait for the problem to worsen. At Premier Heating & Air, our team of experienced technicians can diagnose and fix ignition issues to ensure your home stays warm and safe. Contact us today to schedule a service appointment.