A heater is an important part of your home. It is responsible for moderating the temperature in your home. There may come a time, however, when you may notice your heater blowing cold air. Here are five causes of this issue.
1. Thermostat Settings
Sometimes your heater blows cold air because your thermostat settings are incorrect. A lot of people forget they have switched their thermostat settings from auto to on. When you do this, the fan constantly runs and heating will not occur until the settings are returned to auto or the temp in your home drops below the setting on your thermostat.
2. Thermostat Compatibility
For thermostats, one size does not fit all. Your heater may be blowing cold air because you have chosen a thermostat that is incompatible with your heater system. If you installed the thermostat on your own instead of seeking professional help, you may want to seek professional guidance to prevent damages.
3. Empty Oil Tank
If you have an oil furnace, and you are experiencing problems with cold air, there is a good chance you have run out of oil. An oil furnace will circulate air as it does when the tank is full to provide heat, but when the tank is empty, you will only get cold air until the tank is refilled with oil.
4. Computerized Controls
Computerized controls are features of newer thermostats and may need to be reset, especially if it is new to your heater system. Turn off the system and wait at least five minutes before turning the thermostat on. If this does not resolve the issue, you will need the expertise of a professional.
5. Overheated Furnace
An unclean filter can cause your heater to overheat and eventually shut the burner down completely. You should change the filter and restart the heater.
Source: Finding The Right Space Heater. Consumer Reports.