Most modern heating systems typically last 20 years or longer with routine maintenance. However, it’s not uncommon to notice problems over the years that prevent the unit from heating your space properly. Here are some common signs that you might need furnace repairs from a professional HVAC contractor. 

How to Tell When You Need Furnace Repairs 

1. Lukewarm Air

Furnaces contain a component called a “thermocouple” that shuts off the gas if the pilot light blows out, which prevents fires and explosions. However, if your pilot light won’t ignite at all, the thermocouple may be stuck in the shutoff position. A contractor can remove any obstructions blocking the path between the thermocouple and pilot tube.

2. Malfunctioning Thermostat

Thermostats control the air temperature, sending a signal to the heating element so that your indoor areas get the appropriate amount of heat. Malfunctioning thermostats may result in uneven heating, cold spots, or a complete lack of warmth.

Faulty wiring and excessive debris buildups can prevent the thermostat from communicating with the furnace, but an HVAC contractor can upgrade the wiring or clean the burner to restore proper function. 

3. Unusual Noises

Unusual sounds, such as rumbling, may indicate heat exchanger leaks, causing carbon monoxide to seep into indoor areas. This colorless, odorless gas is highly toxic when inhaled and presents serious health and safety risks.

Additionally, screeching noises often stem from a faulty belt or motor. An HVAC technician can replace a cracked heat exchanger or swap out the motor and belts to restore quiet function and prevent hazards. 

4. Frequent Cycling

Furnaces cycle too often when they become overheated, which may occur due to blocked interior vents, clogged exhaust pipes, or saturated air filters. A heating and air company can remove blockages and clean or replace the filter to prevent the unit from getting too warm and shutting off. 

 

If you notice any of the above issues, contact C & S Heating and Cooling for furnace repairs. This HVAC contractor provides heating and air solutions to homes and businesses throughout Wentzville, MO. Call (636) 327-4238 to get a quote on furnace repairs or ask about replacement units in stock. Visit the website to learn more about whether you should repair or replace your heating system.