Question about Carrier 38BRC036 Air Conditioner
Code 33 LIMIT OR FLAME ROLL-OUT SWITCH IS OPEN - If open longer than three
minutes, code changes to #13. Flame roll-out switch requires manual reset.
Check for: - Dirty filter or restricted duct system. - Loose blower wheel.
- Defective blower motor or capacitor. - Defective switch or connections.
- Inadequate combustion air supply (Flame Roll-out Switch or fuse link open).
- Open Flame Roll-out switch, or fuse link. Manual reset or replace.
Posted on Nov 13, 2013
The limit switches are two wires that go to a small disk about the size of a dime. There should be a tiny button between the wires. Find all the limits and push them to reset them. The draft safeguard is the one that is located where the flu pipe leaves the unit. Sometimes the limits are stubborn and it's hard to push them in. If you can't get it reset then the limit will need to be replaced but it can be bypassed temporarily by jumping the two wire together. Do no do this as a permanent fix. It can cause death.
Posted on Apr 03, 2009
SOURCE: I have a carrier furnace
Lucky for Light Emitting Diodes huh? (led)
I'm looking at a legend, on a Carrier furnace door, right now.
One long followed by two short is the "twenty one" code.
Here's what the door sticker says;
"EACH OF THE FOLLOWING CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT DETERMINED BY THE NUMBER OF LONG FLASHES."
Look on your legend, inside the door of the furnace, to find the code diagnostic recommendation.
Make sure to read the codes several times and see the code from the beginning so you make sure the code starts with that digit.
Knowing this furnace means; the code diagnostic recommendation is just that, a suggestion. It will not tell a trained tech what to fix, only a starting point and tell-tale signs.
Code 21 is the gas valve lockout, and will not reset. May be a gas valve, relay or control board (most likely). Call someone.
It's complex for a trained person too, so if you're not familiar, this isn't something to make a mistake on.
Luck to you. Let me know how you get on.
Posted on Dec 23, 2010
SOURCE: Gas valve lockout
It means that the furnace isn't igniting and for safety the control board is preventing the gas valve from opening. Turn off the power to the furnace for a few seconds then observe what the furnace does in heat mode. Some furnaces will run the blower for a minute after you power it back up. After that see if the furnace tries to come on. If you are still getting the code then one of you high temp limit or roll out switches has tripped. Now is the time for a service tech. Make sure that you check you filter and air flow too. Low air flow means the furnace may be over heating.
The other thing is the hot surface igniter. Look closely at it with the power off. Do you see a white spot on the element or a crack. If so the HSI is bad. It's an easy replacement but DO NOT touch the carbon element with your fingers and be very careful handling it as it is EXTREMELY fragile.
Posted on Mar 17, 2009
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).
Posted on Feb 01, 2009
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