The Family Handyman recommends that owners check their thermostat before assuming the problem causing the furnace to blow cold air is something deeper. There are several things to check at the thermostat. The switch needs to be on heat and not cool. If the fan is set to automatic it blows air, regardless of the room temperature. If the thermostat is set too cool, the furnace does not provide heat.Know More
Digital thermostats have a battery that retains their settings in the event of a power failure. If the power goes off and the furnace starts to blow cold air when it returns, the battery is probably dead. The Family Handyman says this allows the device to reset to its factory defaults, often resulting in a furnace that blows cold air. Reprogramming the thermostat and replacing the battery fixes this problem.
If thermostat programming becomes an issue, it is easy to bypass using the device's hold feature. The Family Handyman tells home occupants to set the device to the temperature they desire and press the hold button. While this provides the heat needed, it also increases the energy consumed, so learning to program the device once the house is warm is worthwhile.
Gas furnaces require a way of igniting the flames to provide heat. Some use a standing pilot light while others use electronic devices. If the electronic starter is defective, the furnace does not heat, according to About.com.Learn More
Reasons that a gas furnace leaks water can include a leak in the air conditioning evaporator or a leak in the humidifier. Water can leak in and around a high-efficiency furnace if the condensate drain tubes are disconnected or clogged.Full Answer >
To troubleshoot a Nordyne gas furnace, ensure the furnace is turned on appropriately, clean and replace the filter and check to be sure the thermostat has power; check the pilot light and the gas line running into the house. The unit's owner's manual should be consulted for solutions for many of the most common problems.Full Answer >
A Heil gas furnace is a heating product made by the Heil Heating and Cooling Products company. The company offers a 10-year warranty on all the functional parts of this product. It also gives a lifetime limited warranty on the heat exchangers.Full Answer >
A gas furnace consists of two parts, an outdoor air conditioning unit and indoor furnace that work together to draw in, heat and circulate winter air and cool, then circulate, warm summer air. These two units contain components including a burn, flue and heat exchanger that contribute to making the process complete.Full Answer >