How do i change the filter as the thermostat inducates it needs to be changed, where do i get he filter?

since there is no model number to go by, let's go generic. Most inducer motors have some way of "proving" it is running to the control board. It may have a centrifugal switch in it or it may have use some type of air pressure switch. The centrifugal switch will usually have 2 wires other than the power wires and most of the time, go to the rear of the motor. The air switch usually has a small rubber hose that pushes onto it and is connected to the fan housing.

You unit is under locked out mode due fail on start up. Get sand paper clean out the flame sensor, and jump the 2 wires that go to the pressure switch as soon as the inducer came on. Doing this the flame should stay on until it meet set temp at thermostat . If it does what said your pressure switch need replacement . Good luck and keep me up to date .

That's an intermittent problem. Could be: dirty filter, dirty blower wheel, dirty secondary heat exchanger, dirty evap. coil, weak or damaged high temp safety, loose wire connection, fault at control board, poor air flow. Just about 100 guesses! Could be's don't solve anything. Check for cleanliness. Clean flame sensor(flame rod that burner flame comes in contact with). These are the first I would try.

On the call for heat from the thermostat the inducer should come on first, a pressure switch proves that the inducer is moving enough air up the stack, closes and energizes the ignition and burners come on. 30 to 60 seconds later the blower comes on. Everything should stay on as long as the thermostat is still calling for heat. When the thermostat is satisfied the burner and inducer shut off and the fan will run to remove the heat from the heat exchanger and then shut off. Cycle complete. Some inducers have a post purge so when the thermostat is satisfied the burner shuts off, the inducer runs for 30 seconds or so and then shuts off. I am thinking that your furnace may be running on the limit switch and when the burner is off but the inducer stays on, maybe the limit is shutting of the inducer. Check your air filter and make sure all your heat registers are open and that the return air grill is not blocked.

replace the fuel nozzel.....if its plugged or restricted it will do this....change fuel filters as well

Thermostat needs to be level and has to be calibrated. Check filter to make sure it is not plugged - you may need to relace it. If it is not plugged - make sure it is the correct filter for unit. Owners manual should tell you what filter to use.

Clean Filter Feature -
The thermostat will display the CLEAN FILTER indicator when it is time to change the filter. Press the Reset Filter button to restart the timer after the filter has been changed or cleaned. Helpful?

Sounds like some one needs a new induce draft fan relay, if relay is located on the main control board you have to replace control board,follow wires from inducer motor and you will find the relay. I could help you more if i knew model # and serial # of the furnace, Good luck.

What filter is the thermostat referring to? The filter to the outside air for my own benefit?

Hi, welcome to Fixya. First thing that I would recommend checking is the filter and air flow in general. The furnace may be overheating, cooling enough to run, overheating and so on. The second thing ( you didn't say so I'll assume it's gas heat) I would check is the tube coming off of the inducer. The inducer is the little blower that generally comes on before anything else on start up. There is a small rubber tube coming off of it. Pull the end of the tube connected to the inducer, then taking a straightened paper clip or similar poke the orifice in the nipple that the tube came off to clear any obstruction. Then retry the furnace. Let me know if this helps please.