6 Most Common Furnace Problems
Rainier Heating & Cooling, LLC • October 24, 2025

Common Furnace Problems and Reason Why They Occur

There are few things more frustrating than experiencing furnace problems during the cold winter months. While regular maintenance can help prevent issues, sometimes problems can still arise. It’s important to identify the cause of the problem in order to fix it as quickly as possible. In this blog post, we will discuss some of the most common furnace problems and the reasons they occur:

Insufficient heating: If your furnace is not producing enough heat, the thermostat may be the cause. Check the thermostat settings and consider replacing the batteries if needed. If the settings are correct and the problem persists, check the air filter for clogs. A clogged filter can lead to poor airflow, which can cause insufficient heating. If cleaning or replacing the filter doesn’t solve the issue, it may be necessary to schedule a furnace tune-up.

Short cycling: A furnace that turns on and off frequently (called short cycling) can be caused by a faulty thermostat or a clogged air filter. It may also be caused by a problem with the flame sensor. In any case, it is necessary to schedule a furnace repair in Federal Way, to fix the problem.

Complete shutdown: If your furnace shuts down unexpectedly or goes into a lockout, it could be due to a tripped circuit breaker or overheating that triggered the safety switch. In either case, it is important to contact a heating repair expert.

Noisy furnace: Strange noises coming from your furnace, such as banging, clicking, rumbling, rattling, or squealing, can be a sign of an upcoming repair need. For example, a banging noise may indicate a dirty or faulty pilot ignition causing a delay in ignition. A rattling or rumbling noise may indicate a loose part within the furnace. It is important to have a licensed HVAC contractor check your furnace if you notice any unusual noises.

Furnace start-up problem: It’s important to address any issues with your furnace promptly to ensure that it’s functioning properly and efficiently. If your furnace is experiencing start-up problems, it’s important to first check the thermostat settings and replace or clean the air filters. If these steps don’t resolve the issue, it’s best to seek the help of a licensed HVAC contractor in Auburn, WA to diagnose and fix any potential gas supply or pilot ignition issues. Ignoring furnace start-up problems can lead to more serious issues and potential safety risks.

It’s important to address furnace problems as soon as they arise to prevent them from turning into larger, more costly issues. If you notice any strange noises, inadequate heating, short cycling, complete shutdown, leaks, or start-up problems with your furnace, don’t hesitate to contact a professional HVAC contractor.

They have the skills, expertise, and tools to diagnose and fix the problem efficiently and effectively. Rainier Heating & Cooling is a reputable HVAC contractor in Bonney Lake, Tacoma, and surrounding areas. Contact them at (253) 600-2758 or info@rainierheating.com to schedule a visit and have your furnace repaired.

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