Heat On But No Warmth: Solving Thermostat Mysteries
There's nothing more frustrating than waking up to a cold home, only to see your thermostat confidently displaying 'Heat On'. You'd expect the warmth to be flowing through the vents, but instead, you're met with cold air or an eerie silence. This puzzling phenomenon is more common than you think, and it's often a result of a miscommunication between your thermostat and furnace. To get to the bottom of this, it's essential to understand the intricacies of your heating system and how to troubleshoot the issue. The thermostat's 'Heat On' signal is merely a 24-volt signal sent to the furnace control board, indicating that the thermostat has done its job. However, this signal doesn't guarantee that the furnace is actually producing heat. If the furnace fails to light due to a dirty flame sensor or a bad igniter, the thermostat will continue to display 'Heat On', oblivious to the fact that your home is getting colder by the minute. Troubl...