Carrier weathermaker furnace 8000: red light is blinking 1 then 4..on panel it says 14 blinks (error code 14) what do we need to do. on the panel it says go to problem code 34 which says 3 hour loc

SOURCE: Furnace wont run

First of all when you flip the switch, it goes thru a startup sequence. THEN it turns on the Igniter (notice the red glow). Then the gas turns on.

Now at this point check the idiot light and it should be giving you a code of 34. That 34 (3 shorts 4 longs) says that there was a problem igniting the furnace. After it cycles thru at least 4 times and fails to ignite all the blowers, then is when you get a code 14 (1 short 3 longs)

NOTICE what's happening with ALL the burner Tubes each time it attempts to ignite. If only one or two are running....then this is your problem.
To fix all you do is take out the burner Tubes, look for debris, blow them out (blow from the front where all the jets are), and replace them in sequence from left to right (the tabs overlap).

SOURCE: weathermaker 8000 58tua stops frequently

Removing the front cover or turning the line switch off and back on causes a "HARD" reset to the furnace. That means, it breaks the line or supply voltage to the furnace and causes the main control board to reset. The main reason for requiring a hard reset is a failure to fire up correctly. There are several reasons for this to happen. If or when the flame sensor detects a flame determines the whole process. When the thermostat calls for heat, the ignition controller delivers spark to the pilot assembly and the pilot gas valve opens. If the sensor detects a pilot flame, the main gas valve opens and the main burners ignite. The pilot flame can be pulled away from the sensor when the main gas opens just long enough to cause this type of failure before the main flame is sensed. The furnace will shut down thinking it is feeding in raw gas with no pilot present to ignite it. All of this happens in just a few seconds. If there is a small window in the burner cover, you can watch it fire after the reset for a clue to the cause. If there is not an inspection window with a sealed combustion chamber to watch it through, it would be best to call a good tech. as it is dangerous with such a short period to ignite while all that gas is flooding the combustion chamber. Check to see if the line from the pilot to the gas valve is tight. If possible, try to move the sensor a little closer to the pilot. If this does not work, best to call a tech. who is familiar with your furnace. Other test with an open combustion chamber are very dangerous and best left to the pros.

Testimonial: "Thanks a lot, Roger! When you talk about sensor, do you mean flame sensor."