3 Signs of a Faulty Furnace Gas Valve

A furnace gas valve allows natural gas or propane to flow into your unit. Occasionally these valves will stop opening and closing properly due to an obstruction, rust, or old age. If this valve malfunctions, it could be a hazard to your health and home as gas or propane will freely flow from the furnace without combustion.

Below are the 3 common signs of a faulty furnace gas valve to keep an eye out for as a faulty valve could be creating an unsafe environment. When in doubt, always call an HVAC professional.

FYI: When the valve stops working, it needs to be replaced as a repair is often more costly than a replacement. Typically, a gas valve replacement costs anywhere between $400 and $1000, making it one of the most expensive parts in a furnace to replace.

Gas leak

Sometimes a gas valve will get stuck open, allowing too much gas into your furnace while it is running, or allow gas to leak into your furnace while not running. Not only is this gas a fire hazard, but inhaling gas is very bad for your health. If you smell gas in your home, open your windows, exit your home, and call 911 immediately.

System failure

If your furnace is not heating your home or having trouble starting, this could mean your gas valve has malfunctioned and is not supplying enough—if any—gas to the unit. This means the ignitor will not work, your furnace will not be transferring any heat, and the system will stop blowing warm air. If the furnace is not running or it is not blowing warm air, call for a repair.

Though a system failure could be the result of a faulty furnace gas valve, there are many other possible culprits. If your unit is not blowing warm air, there are many other possible causes. Click here to learn more.

Furnace cycling

Similar to a system failure, when your furnace does not receive enough gas, it may continuously cycle to try to reach the temperature set on your thermostat. When the thermostat does not read the correct temperature, it will continue to tell the furnace to run. Regardless of the cause, a constantly cycling furnace could result in an overheated blower motor or other avoidable repair. If your furnace is cycling, shut the unit off and call for a repair.

In need of a furnace repair or inspection? Grand Home Services in Aurora, Colorado provides furnace inspections, repair, cleaning and replacement services throughout the Denver Metro Area. Whether it is an emergency or you need some guidance, do not hesitate to reach out to us! Contact us online or call us today.