Re: when burners come on makes a swiching noise and then...
The carrier sx series went through a number of control systems over the years. can you find the full model, and series numbers? They are located behind the door on the left side. (i.e. 58 sxc080-100 series100)
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Not sure what model yours is, but sounds like you have a bad start capacitor that has dried up or swelled and "snapping" when making connection. If you can give me the Brand and model number I can see what capacitor you need.
It could be the control board, But before I would replace the board I would check to see if the flame sensor is not touching the burner and shorting it out. Also check the flue make sure it is open. This has a combustion blower on it and a proving pressure switch. Some time the pressure drops when the burners come on will trip the switch and start the process all over again and acts just like a flame sensor fault if the flue has some blockage. Also make sure you have a good ground back to the board. A little rust on the burner right at the flame sensor can block the micro signal back to the board. I am sorry I can't remmember the light codes. There should be sticker on the panel with the wiring diagram that show the codes. Good Luck I hope this helps....
I believe this code is ignition failure.
Turn power off and after 20 seconds turn power on with thermostat calling for heat.
Vent blower should come on first. After a bit igniter should lite up. You should hear click noise
of gas valve open up. If igniter does lite and you hear click noise, flame should come on for a few seconds minimum. If igniter doesn't lite and you hear click noise from gas valve, igniter is bad. If flame lites and then goes out, flame sensor probably needs cleaned.
Both igniter and flame sensor are in metal plate under burners. Igniter has 2 wire going to it and flame sensor has one wire. If you think it is flame sensor you can remove with taking it out with 1 1/4" hex screw. Flame sensor will have white film on it if it needs cleaned, clean with steel wool or a dollar bill.
If it isn't weither of these it is gas valve or circuit board.
Hi; Sounds like a bearring is getting dry and sweaking. Sometimes You can acess the motor from under the hood very easy. If not please let a person with auto skills attempt this Weather its a friend or a professional...alpharome416
look for the gas valve and on the top of it there should be a valve that has either off, pilot, or on. Turn it to pilot and depress the knob. At the same time follow the small tube that comes of the valve and at the end of it is the pilot burner. Hold a match to the pilot burner and when it lites keep on holding the knob down for about 20 seconds. If you can release the valve and the pilot stays lite then you can turn the knob on the gas valve to on.
I'm a little confused by your terminology. You are saying you have a pilot lite and electric heat strips? Are you possibly meaning burners? Is the heater running for 2 hours straight without shutting off? how cold is it there? Lastly what temperature do you have the thermostat set at and how close does it get to the temp. before it shuts off?