20 Most Recent Carrier Weathermaker 8000 Gas Furnace 125k Btu - Page 2 Questions & Answers

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.

The only thing I would fuss with on a furnace is the optical sensor that checks to see if there is flame. It would be a metal tube sticking into the combustion chamber, with a lens inside, or a flat black plate near the igniter. The lens can get sooted, need to be cleaned off. Otherwise, it's a service call to check the gas control coils. Be real careful not to touch the igniter, it is super delicate.

Check the pilot lt. If its out shutdown your furnace and call a repairman. If the pilot light is on, the flame sensor might have gone out. It's a long silver sensor that sits in the pilot light flame and senses when the flame is present. If it isn't working the furnace will automatically shut down.

YOUR FURNACE IS IN LOCKOUT MODE DUE TO A SAFETY FEATURE OF UNIT. USUALLY THE HIGH LIMIT HAS BEEN TRIPPED, OR YOU PRESSURE SWITCH FROM DRAFT INDUCER MOTOR FAULTY OR PLUGGED. IT WILL CONTINUE LOCKOUT MODE UNTIL THIS IS FIXED.

check your over-flow bottle & radiator for coolant ( this is the usual round silver cap in front of engine compartment // says DO NOT OPEN WHEN HOT !!!!!!!!! ) if empty ,look for leaks or have pressure tested for leak ------------ also check to see if electric radiator is turning on when it reaches operating temperature , this fan will also run or cycle on & off with the air conditioning on....--- if not check under hood fuse // relay for this circuit......

Hi,
Check for power out of the contactor...is the condenser fan running?? If so then the compressor should have power...could be the compressor capacitor...or a bad compressor.
Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...

AirConditioner Trouble - Review the Possibilities

heatman101

it's either an electrical problem or it has internal damage.

how to solve the this alaram what is the reason getting this alaram ,how to fault finding

Not being sure about this model but do you have the air hose connected to the tire vent and does it meet the minimum requirements? This may be the only way that the compressor can know how much pressure is in the tire and to start counting.