Causes Of Your Furnace Not Heating

31 January 2023
 Categories: , Blog


The cold season can be hard to bear without proper heating. As such, a furnace becomes vital in maintaining warm temperatures, relative humidity, and clean air. Unfortunately, your heating appliance may deteriorate with age or continued use, preventing it from heating properly. This may lead to outdoor temperatures creeping into your house, causing discomfort. Thus, you should employ heating services to inspect the furnace and fix the underlying malfunction for peak efficiency. Read the causes below to learn why your furnace is not heating.

Restricted Airflow

Furnace filters trap dust, dirt, and debris to ensure clean air circulation. However, these filters may clog with contaminants, restricting airflow and creating soot build-up on the heat exchanger. In addition, ducts can deteriorate from constant temperature changes, causing air to leak. On the other hand, restricted vents can cause pressure imbalances, leading to duct joints detaching and collapsing. Ultimately, clogged filters and damaged ductwork increase the strain on the furnace, causing it to overheat and shut down. Therefore, you must contact a furnace repair professional to replace your filters regularly and seal leaky ductwork.

Thermostat Issues

A thermostat displays the current room temperature for precise indoor climate control. Unfortunately, the wrong settings can prevent your system from heating. For instance, configuring a set point lower than the room temperature will not activate the system to heat. On the other hand, dirt can accumulate in the thermostat's sensor over time, causing it to detect temperatures erroneously. As a result, it may relay the wrong information, leading to the furnace not heating. Thus, you must clean your thermostat and ensure the right settings are in place to avoid a huge discrepancy between room temperature and set point.

Weak or No Gas Supply

A furnace depends on a steady gas supply for normal operation. That said, you can accidentally turn off a gas valve, preventing gas from reaching the furnace. Moreover, gas lines can deteriorate from corrosion, leading to leaks. When this happens, your furnace will not heat efficiently, and you might notice a smell of rotten eggs in your home. Therefore, you should engage a heating repair expert to patch the leaks and ensure an adequate gas supply to your unit.

Tripped Circuit Breaker

Electrical malfunctions in the furnace may cause the circuit breaker to trip. This can happen when vermin eat through wiring insulation, resulting in live wires encountering neutral ones. Ultimately, this leads to a short circuit, tripping the circuit breaker. Furthermore, if you overload a socket with too many appliances, it may draw excessive current. As a result, the circuit breaker will trip to prevent overheating and other damages. Thus, you should contact a heating repair expert to replace the worn components for proper current flow.

Attempting to fix a furnace that is not heating without professional help, however, may result in more damage. Therefore, you should book an appointment with a furnace repair technician to inspect your unit and address underlying malfunctions. For more information about heater repair services, reach out to a local contractor.