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Hello, usually tne blower runs longer to get all the cold air out of the air ducts, same thing happens in heating evcept it's warm air. You can change the blower timing by adjusting it on the integrated control board, it will say blower off timeing, this is what you use to adjust the blower timing. However, 90 sec is the least the blower will run on most furnaces.
1) Turn the fan to on and if it runs you know that you have line
voltage to furnace and 24volts to the thermostat.
2) You could turn the furnace off remove the doors and get to the
control board. If you can find the Thermostat wires on the board
mark and remove them. If you have a typical Furnace and you
have some electrical background put a jumper wire between
terminals R and W,put the doors back on-there is a door switch
that if the panel is not put back on-it will not run. Turn your power
3) The Blower motor may come on, the induced draft blower should
come on, the glow coil should glow, the gas valve open and the
burners should come on and the unit should run.
4) If all of this happens, then you have a thermostat problem or you
have bad thermostat wires.
5) If nothing happens then you don`t have power to the furnace or the
little fuse that protects the transformer is blown.
Its not getting enough juice from the battery. Get a new battery. You can only re-charge a battery so many times. Many times people ruin the battery by not fully charging and draining a battery. The battery that came with this cam has a memory. Get a new battery.
Check the heat anticipator setting on the thermostat if its a mercury type thermostat. It may not match the proper amp draw. Take the cover off and it is a little metal lever. Try different adjustments to see which are better. If its a digital thermostat it may have an internal setting. There are several other possible reasons this could happen but that would be the most likely. for more infor on self diagnosis or the like check out my fave website Ra-Jac Air Conditioners and Heaters TX for repair information.
PS: If its a new installation it should have a one year warantee so call back the person who put it in. If you did it yourself be extremely careful gas furnaces can be dangerous. You might want a service person to check the job out for safety hazards. Good Luck with it.