Furnace stopped working. thermostat shows system is on, but it isnt. Gave a see;worked. tech say doomed to failure switch the thermostat is programmed. When I came home, warmth was not running....
the thermostat is programmed. When I came home, warmth was not running. Checked the thermostat and it shows system is on. Checked adjectives switches everything was on. Went to furnace and open the doors etc... nothing.. put the doors vertebrae and gave it a see and it worked. Called tech, he says flawed switch and it will die on me again. He says section is free but $100 to install.
The unit is 3 years outdated. 02/2004.
Answers: Hate to break it to you, but by reading what you did I had to giggle. Not at you but at the circumstances you described. The kick didn't fix it, taking the door past its sell-by date and putting it back on did. What you did is reset the control board by adjectives the power to it. What is really happening is thoroughly normal. Im guessing at this one, but because you enjoy a newer furnace, they all come near a flame rod sensor. Every time a furnace calls for bake there are a few things that come to pass in a specific command for the furnace to run.
1. Inducer motor will start up. (little fan in the vicinity top of furnace)
2. This fan running will create preasure contained by the vent that is tied to a pressure switch.
3. This pressure switch will close which will contained by turn start the hot surface ignitor.
4. The hot surface ignitor will start to glow, some inside 2-3 seconds and some almost 30 second. This is to ignite the gas.
5. At a specified number of seconds the gas tap will click and open.
6. Flame rod sensor have about 2 second to verify flame through a very small Millivolt current generate by the flame itself.
7. If flame rod sensor does not detect flame (could be dirty) the control board shuts off gas tap.
8. At this point the fan will be turned on and blow cold nouns.
9. If this condition happens 3 times, the furnace will lock itself out and not work.
10. You reset power and computer is rebooted and starts complete sequence over again.
In other words watch what the furnace does, if any of these symptoms happen according to the sequence of operations later you will know what is happening. I'll bet dollars to donuts adjectives you need to do is verbs the flame rod sensor with a bit of sandpaper. :P
Could possibly be the door switch, as the tech said. that is to say a lot of money to install a door switch, I would convey him to get the switch which he is getting beneath the five years parts warranty, and install it yourself. It consists of two wires and when you unplug the unit, you will not enjoy to worry almost the power.