Question about Carrier XHB123D X/Y Series Heat/Cool Air Conditioner

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Slow gas on Carrier 8000 58TUA?

We are getting repeated lockouts from the flame sensor. I've cleaned it well and all the connections are clean and tight. The ignitor is plenty hot, too.
It seems to me that there is QUITE a lag between the gas valve solenoid "click" and the first flash of flame...as if the gas had to travel a long way to get to the burners.
Therefore the flame sensor is almost ready to "time out" as the flame first hits it. It shuts down within a quarter second of the flame wave getting over there. It almost never catches on the first attempt, often does so on the second or third, and sometimes does not at all.

We have an adequate municipal supply, and the furnace gas piping is factory standard.

Can I adjust the flame sensor time to add a couple of seconds?
Can I increase the gas pressure a teensy bit to get it there faster?
Can I adjust the gas valve timing to open a couple of seconds sooner?
Could it ACTUALLY be the flame sensor? Hate to pay to replace it since it seems to work well if the flame hits it for one second.

Thanks!

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Saw this happen one other time where the regulator at the outdoors gas meter was faulty and not supply the correct gas pressure. You may need to have the gas company come out and check the pressure at the meter. Also, check to make sure no other gas appliances are running..ie..water heater, gas logs, stove, etc. and then start up the furnace and see if it will start up properly. This would also indicate a problem at the gas meter...ie..gas pressure.

Posted on Dec 21, 2008

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1 Answer

My adp cuhn-60a-2 sparks an lights burner ok, burns for only few seconds an shuts down burner, repeats this three times an whole unit shuts down?


You are describing the typical issue for a problem in the 'flame rectification' circuit. Turn the powere off. Find the flame sensor, it will be on the opposite side of the furnace from the spark ignition device. Carefully remove the sensor and clean with fine sandpaper, then clean the wire connector on the end of it if so equipped, then follow that wire all the way to the circuit board, remove the wire connection and clean it and reinstall. Many times that solves the issue.

Some systems utilize the spark ignition electrode as its own flame sensor. IF there is no separate flame sensor, perform the above task on the ignition device instead. Be careful NOT to bend the probe, crack the ceramic insulator or reinstall it malaligned. Its location in the pilot flame is critical. Slight relocation by improper handling will render it unable to ignite the pilot gas.

There may be another issue as there are many things that cause ignition lockout, but this is the first thing to do to eliminate the situation you've described.

If you are unsure of performing this and ANY minor maintenance to a gas fired appliance, abandon the idea and call a qualified service tech to proceed.

Dec 29, 2014 | Heating & Cooling

1 Answer

What are the carrier 8000ts led error codes?


They are listed inside the front panel of the main unit.

LED CODE

EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST

DIGIT DETERMINED BY THE NUMBER OF SHORT FLASHES AND THE SECOND DIGIT BY

THE NUMBER OF LONG FLASHES.

STATUS

11 NO PREVIOUS CODE - Stored status code is erased automatically after 72

hours. On RED LED boards stored status codes can also be erased when power

(115 VAC or 24 VAC) to control is interrupted.

12 BLOWER ON AFTER POWER UP (115 VAC or 24 VAC) -Blower runs for 90

seconds, if unit is powered up during a call for heat (R-W closed) or R-W opens

during blower on-delay.

13 LIMIT CIRCUIT LOCKOUT - Lockout occurs if the limit or flame rollout switch is

open longer than 3 minutes.

- Control will auto reset after three hours. - Refer to #33.

14 IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.

21 GAS HEATING LOCKOUT - Control will NOT auto reset.

Check for: - Mis-wired gas valve -Defective control (valve relay)

22 ABNORMAL FLAME-PROVING SIGNAL - Flame is proved while gas valve is

de-energized. Inducer will run until fault is cleared. Check for:

- Leaky gas valve - Stuck-open gas valve

23 PRESSURE SWITCH DID NOT OPEN Check for:

- Obstructed pressure tubing. - Pressure switch stuck closed.

24 SECONDARY VOLTAGE FUSE IS OPEN Check for:

- Short circuit in secondary voltage (24VAC) wiring.

31 PRESSURE SWITCH DID NOT CLOSE OR REOPENED - If open longer than

five minutes, inducer shuts off for 15 minutes before retry. Check for:

- Excessive wind - Proper vent sizing - Defective inducer motor

- Low inducer voltage (115VAC) - Defective pressure switch

- Inadequate combustion air supply - Restricted vent

- Disconnected or obstructed pressure tubing

- Low inlet gas pressure (if LGPS used)

If it opens during blower on-delay period, blower will come on for the selected

blower off-delay.

33 LIMIT CIRCUIT FAULT - Indicates a limit, or flame rollout is open. Blower will

run for 4 minutes or until open switch remakes whichever is longer. If open

longer than 3 minutes, code changes to lockout #13. If open less than 3 minutes

status code #33 continues to flash until blower shuts off. Flame rollout switch

requires manual reset. Check for: - Restricted vent

- Proper vent sizing - Loose blower wheel - Excessive wind

- Dirty filter or restricted duct system.

- Defective blower motor or capacitor. - Defective switch or connections.

- Inadequate combustion air supply (Flame Roll-out Switch open).

34 IGNITION PROVING FAILURE - Control will try three more times before lockout

#14 occurs. If flame signal lost during blower on-delay period, blower will come

on for the selected blower off-delay. Check for: - Control ground continuity

- Flame sensor must not be grounded

- Oxide buildup on flame sensor (clean with fine steel wool).

- Proper flame sense microamps (.5 microamps D.C. min., 4.0 - 6.0 nominal).

- Gas valve defective or gas valve turned off - Manual valve shut-off

- Defective Hot Surface Ignitor

- Low inlet gas pressure

- Inadequate flame carryover or rough ignition

- Green/Yellow wire MUST be connected to furnace sheet metal

45 CONTROL CIRCUITRY LOCKOUT Auto-reset after one hour lockout due to;

- Gas valve relay stuck open - Flame sense circuit failure

- Software check error

Reset power to clear lockout. Replace control if status code repeats.

If status code recall is needed, briefly remove then reconnect one main limit wire to display

stored status code. On RED LED boards do not remove power or blower door before initiating

status code recall. After one status code recall is completed component test will occur.


Thanks for Choosing FixYa.


Kelly

Oct 05, 2010 | Heating & Cooling

1 Answer

I have a rudd hot air gas furnace,ignitor sparks


to carmelmontgo; do you have a smart gas valve sometimes the wire connections get loose. remove wire connector then reinstall. also cleaning a flame sensor will work if the flame sensor is good. I would check the ground connection sometimes contaminated with rust. also I would check the gas pressure with a gas manometer...my email is alpharomeo@windstream.net

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Goodman Heater kicks on but then it goes off as the burner is trying to ignite. Then come on and goes out after a few times 3 to 5 times, after awhile it will stay on... Then start all over again after it...


the gas furnace has a flame sensor when the flame kicks on and the flame sensor doesn't sense it it will shut off as a safety precaution and try three times to start again and then will lockout what you need to do is find the flame sensor it usually looks like a metal rod about 1'' -1 1/2'' long in a porcelain cylinder. it looks kind of like a mini screwdriver. You have to clean the metal rod with sandpaper or sandcloth the flame sensor actually conducts electricity with a flame cleaning them usually works make sure you check your connections especially ground.

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Furnace keeps turning on and off


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1 Answer

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After the gas turns on, it is the flame sensor's job to see that ignition took place and send 24v to the gas valve. If it does not do this, the gas valve shuts down as a safety precaution. After 3 tries, the furnace will go into "lockout" and will not let it attempt to start again. The lockout can be resolved by turning off the power to the furnace for a couple minutes and then turning it back on. Sounds like the real problem is a faulty flame sensor not sending 24v to the gas valve. Sometimes they can be cleaned with a piece of sandcloth. This will cure failure to recognize the flame due to carbon build up on the sensor. Otherwise, the sensor will need to be replaced. Hope this helps!

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My oil boiler is a Danesmoor SLPJ 20-25 with an Electro Oil Inter 2011 burner. The oil tank ran out and after refilling the burner ran ok for approximately 6 minutes, the control box chattered and the...


you could have a problem with a temperature sensor.
it would not be the flame sensor since it could not wait 6 mins to sense that there is flame in the unit.
could be a temperature sensor problem where it is sensing a temperature which could be correct but it is sending a wrong signal to the controller to turn off the flame and start another cycle.

tnx 4 using fixya,

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Carrier furnace weathermaker 8000


. Several times of recyling power normally brings the furnance up. Though the failure code has always been 31, there are several different behaviour when the blower starts after reset :
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