Talking About Air Ventilation Systems

5 Common Furnace Problems

Many people don't spend a lot of time thinking about their home's furnace until it starts having problems. Luckily, many common furnace issues can be repaired if caught early, so you probably won't have to completely replace your unit. Continue reading to learn about some of the most common furnace problems.

Thermostat Malfunctioning

A furnace relies on its thermostat to sense the temperature in a room so the furnace runs properly in order to heat the area to the set temperature. If your furnace has a broken thermostat, it may run too long and too often, and that can lead to very high heating bills. An HVAC technician can typically repair or replace a broken thermostat or thermostat sensor so your furnace can run properly.

Clogged Filters

Clogged or dirty filters can wreak havoc on a furnace and make it have to work much harder than it should have to to force out warm air. Extremely dirty filters may also damage the limit switch, which controls the fan inside the furnace. If you can't remember the last time you had the filter in your furnace changed, contact an HVAC services company to do an inspection and change the filters.

Continuously Running Blower

When the blower on a furnace is running constantly, there is a problem. In many cases, the problem is caused by a broken limit switch. A damaged limit switch can be replaced, but the repair should be made by a professional to ensure that the new switch is installed properly.

Strange Sounds Coming from the Furnace

After living in a house for a while, you most likely know what your furnace sounds like when it is in good running condition. If you begin to hear grinding, squeaking, or rattling sounds, it is important to have parts repaired or replaced in a timely manner. Strange sounds from your furnace can be signs that mechanical parts have worn out and failed, that airflow is somehow being blocked, or that a burner has become clogged. 

Lack of Power

If your furnace won't turn on, or if it turns on and then turns off, there may be an electrical problem. In this situation, make sure you check the circuit breaker to see if a circuit has tripped. Flipping the breaker switch typically fixes the problem, but if a breaker is tripping constantly when the furnace is powered on, you should contact an electrician so they can repair the problem. 

If you need to get new parts, then you can order them through a company such as