Shorted thermostat furnace was not getting warm and kept shuttung off after about 30 seconds . I was tampering with the wires from the thermostat and touched both terminals on circuit board and it sparked now the furnace wont even ignite

An open limit switch may make the fan run all the time. Try disconnecting the Green wire @ the furnace...if that does the trick, then either the thermostat fan relay is stuck, or there is a short between the Red & Green wires somewhere in the thermostat wire.

Hello.
First, try to clean the board, perhaps humidity make shortcircuits betwen logic gates. Second check capacitor, if someone is inflated, replace it.

It's hard to answer your question without the age and brand of your heater but the blinking of the red light can be a heartbeat, which indicates all systems are ok and there is power or the blinking is like 2 blinks, pause, and 2 blinks, pause repeating. That would indicate a failure code. In that case Google the model and serial number to get the failure code.

Sounds like the heat anticipator in your thermostat is either bad or out of adjustment. Turn of the furnace power. Remove the thermostat wires from the thermostat. Turn the power back on. Connect the white and red wires together. The furnace should start up. Let it run a couple of minutes. Then disconnect the wires. The burners should shut off immediately. The blower will continue to run for 60 to 360 seconds then shut off. If this happens replace your thermostat. If the burners continue to burn, then your problem is either the furnace or the thermostat wires.

This blower is controlled by a timer that is built on to the PC board. Can you tell if the burners are lighting at all? If they are not lighting then it is probably the gas valve. If they are lighting then it is going to be a thermal couple.

Sounds like that is a 'prepurge" on your furnace. Remove the doors on the furnace and look at the wiring diagram it will usually say on there where to place or move a small jumper from a 0/30/60/90 second prepurge. On some models this may not be adjustable. If your brand is a carrier this may be the case.

The Red and White wires coming from the furnace are the only ones that call for heat. the Green wire turns on the fan continuously, the yellow is for AC. If you have another wire color, it may be a Common wire and should not be used if your t-Stat has batteries. If no batteries, it goes to the C screw.

Is this furnace standing pilot or electronic? if standing pilot turn power off then take t-stat off wall and connect the wires labeled r and c together and see if that keeps furnace working. If electronic check flame sensor you can check flame sensor buy cleaning with steel wool. if that doesn't work then try t-sat.

Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.