Common Furnace Malfunctions

The only time you need your furnace is when the weather cold (or frigid!). At those times, the furnace may stop working at 1:00 am, you wake up with goosebumps, become desperate for warmth, and you don’t know how to troubleshoot the furnace problem. Common furnace problems can be fixed by the homeowner yet some may need the assistance of a professional. Read more about the most common furnace issues below!

Thermostat Malfunctions
A malfunctioning thermostat furnace fan that cannot be adjusted at any comfort levels.

Reduced Air Flow
This problem is easy to fix. If you cannot see through the furnace filter, you should replace the filter. Pay attention how the filter is put in place. A clogged filter causes reduced air flow, inefficient heating and may damage the limit switch that controls the fan.

No Heat
A defective thermostat, pilot light, no power or gas.

Lack of Maintenance with Multiple Problems
Requires annual inspections. Prevent problems by an HVAC contractor.

Normal Wear and Tear
trouble areas may be problems with airflow, overheating and problems with heat control.

Frequent Cycling 
The furnace sounds that it is turning “On” and “Off”. Maybe due to poor airflow or thermostat setting or a clogged filter.

Pilot Control or Electronic Ignition Problems
Requires full inspection because different furnace defects can cause these problems.

Blower Keeps Running
Check the limit switch which may need replacing.

Noisy furnace
A mechanical problem which requires a full inspection. The noise may be due to issues with the fan caused by worn out fan bearings and should be replaced.

Quick Furnace Tips

  • Change the air filters at least once a month.
  • Check the thermostat and change the batteries of the thermostat
  • Maintenance every year.
  • Furnace installation with a furnace contractor.
  • Ignition control problems require immediate maintenance.
  • Check the gas valve.
  • Check circuit breaker and power supply.

Don’t wait till it gets too cold! If you need furnace maintenance services or a heating repair, contact the expert team at AAC Services today.



Home Furnace Thermostat
Adam’s video pick to help with your project-

The furnace thermostat is the nerve center of your home heating system. It’s the main control point that determines when and how much heat will be produced by the...

Air Duct Cleaning: Scam or Not?

Should You Have the Air Ducts in Your Home Cleaned?
Adams video picks-

First and for most I want to suggest that if or when you hire a...

Furnace Air Filters

Understanding Your Furnace Air Filter
Adams video pick-

When you have a central furnace and air conditioning system, air quality often becomes an issue. These types of systems use duct work to transport air throughout your home. As one vent...

Heating with Gas

A guide to choosing furnace size, efficiency, and features
Replacing or improving a furnace may not pay off as handsomely as it did during the energy crisis of the late 1970s. But it may deliver steady, modest savings. And efficient heating isn’t only...

Get Your Furnace Tax Credit Now

Consumer Tax Incentives
Home Heating & Cooling Equipment
What are the incentives for home heating & cooling equipment?
Purchasers of highly efficient heating, cooling, and water heating equipment can take tax credits of 30% of installed cost for purchasing qualifying equipment,...

Invisible killer

Carbon Monoxide in Your Home
Adams video pick-

Carbon monoxide could be leaking in your home right now, and unless you have a detector installed, you wouldn’t even know that it was happening until you were poisoned. Yet, every day you...

Money Lost in the Attic

Attic Insulation
Adams video pick-

If you look at a weather map you will notice it’s not just Detroit, but the entire Northeast portion of the country that is being hit by harsh winter weather so far this year. Many homeowners...

High Efficiency Furnace, will save you Money….

High Efficiency is all the talk
Efficiency is in demand today. Whatever you do, you are expected to be highly efficient in it. Well, this is true with our home appliances as well. With the bills reaching the sky, the environmental issues and...

Know who to call

The Right Repairman for the job
It’s cold outside and your heat cuts off! It’s a problem most of us will probably encounter at some point in time. Don’t get burned when it comes to having a furnace doctor make a house call to...

How to choose Central air conditioning

From Consumers reports 2006:

What’s the best way to ensure that the central air-conditioning system you choose is
installed properly, and will provide the most efficient and reliable cooling for your home?
The pointers below can help you to...

Get your Home in the Zone and Save $$$

What is Zoning and Zone Control?
Zoning and Zone Control of Heating, Ventilating and Air Conditioning (HVAC) Systems are two ways of saying individual temperature control from one central HVAC System. Typically with almost all forced air systems there is only one thermostat...