Causes of No Heat Situations
November 24, 2017
It’s a chilly night in Central Illinois. You get home from work, you expect to walk into a toasty abode. The last thing you want to find is that your furnace is not producing any heat. To make things worse, it’s actually blowing cold air!
Even if your heating system is relatively new, things can go wrong that cause no heat situations. In some cases, you may be able to get it functional again by doing some simple tests and fixes. However, knowing when to call your local HVAC company can help you save time, money and keep you from spending unnecessary time in the cold.
Below is a list of the most common reasons why your furnace may not be heating or is blowing cold, along with some practical troubleshooting tips.
The Thermostat is Not Working Properly
Before you presume you have a furnace problem, check the thermostat to make sure it’s actually telling the furnace to turn on. Thermostats, especially those that can be programmed, can be complex, and the more options a thermostat has, the more that can go wrong.
First, you need to check if your thermostat is set to “HEAT” and not “COOL”, and make sure that the fan is set to “AUTO”. Then, confirm that the thermostat is set to a temperature high enough to trigger the furnace to activate and release heat.
If your thermostat is correctly set, ensure that it is getting power — inspect the batteries, fuses and circuit breakers. Also, make sure that the thermostat’s inner parts are clean. That’s because dirt and debris inside the thermostat can cause it to malfunction. The good thing is, this problem can be easily fixed. In some cases, a failing thermostat may require adjustment or replacement.
The Door Cover is Open
If you have recently changed or cleaned your furnace filters, it is possible that the door of your furnace has been left open or closed improperly. In this case, you may fix the problem by simply properly shutting the door cover on your furnace.
Too Many Heat Registers are Closed
When too many heat registers are closed, heat builds up in your heating system, forcing air out of any duct leaks you may have and requiring the blowers to compensate for the added pressure. HVAC pros suggest keeping at least 80 percent of your heat registers open to prevent unnecessary air from building up in your furnace.
The Pilot Light is Out
If you have an older furnace with a continuous pilot light, the pilot may have gone out. First, confirm that the pilot light is out. Then, turn the gas valve to the “OFF” position and wait for about five minutes. If your furnace has a reset button, turn the gas valve to the “PILOT” position and hold a flame to the dedicated pilot opening while pushing the button for about 30 seconds. Once the pilot is lit, turn the gas valve back to the “ON” position. If the pilot light won’t stay lit, it’s possible that there is a problem with the ignition system or the thermocouple. Call your local HVAC company for proper furnace repair.
The Oil Filter is Clogged
If you have an oil-powered furnace, its filter can become congested with dust and debris, similarly as with gas-fired systems. When the filter is clogged, ignition can be affected and the result is cold air. If you don’t mind getting messy, you can clean or replace the filter yourself. However, this job is not as easy as replacing an air filter in a gas furnace so you may want to leave it to the pros instead.
The Flame Sensor is Filthy
The flame sensor protects your furnace against the dangerous burning of fuel, and a dirty flame sensor may cause your furnace to malfunction. Normally, the flame sensor comes in the form of a rod found in the back of the furnace, right in the direction of the burner. To clean the sensor, turn off power to the furnace at the breaker box. Then, if possible, remove the sensor from the furnace. Clean the sensor by removing dust and other residues. Finally, fasten the sensor and turn the furnace back on.
Call the HVAC Experts at Bratcher Heating & Air Conditioning
If all else fails, a reputable heating company in Peoria IL, like Bratcher Heating & Air Conditioning can help you get your heating system back working promptly. Our goal is optimal comfort for all of our customers and our field technicians will restore the warmth to your home, giving you and your family the comfort and safety you deserve.
If you require furnace repair in Peoria or other neighboring cities in the Central Illinois area, give us a call and we’ll be happy to help.