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Blower is running. Inducer motor comes on then shuts off after 10 seconds. Diagnostic lights say open limit switch. Any suggestions?

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Yes, look for manual resettable limits on your exchangers (where the flame goes into), or just check for continuity with meter. There is also an auxilary limit on exhanger cabinent, take those two wires off and plug in a paper clip, restart furnace, if it works replace the limit. You can do the same with the manual reset one, paper clip the two wires and bypass the limit. Don't leave this bypassed for long, it protects your furnace from fire hazard, replace asap.

Posted on Dec 06, 2008

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I have a programmable thermostat that I set to 68 at night. The system turns on and runs, but when I woke up this morning, the tempterature in my house was 58. I felt near a vent and it felt like it was...


Hello, sounds like the units high limit switch is opening and shutting down the burners. When this happens the blower motor and inducer motor will run nonstop....and this is why you probably just felt cool air blowing from the air duct. Usually a dirty filter, blower wheel or weak blower motor can cause the units limit switch to open.

Dec 01, 2011 | Heating & Cooling

3 Answers

1993 goodman status light 4 times blinking


Witch blower is running, the inducer or the systems blower?
System blower could mean the the high limit is opening and shutting down the systems gas train, I would check this out first.

The other problem could be with the pressure switch for the gas train, it is supplied from the inducer motor, check to see if it is operating fully.

HSI boards do go from time to time, this sounds more like a system control problem.

Jan 24, 2008 | Goodman GMS90703BXA Heater

1 Answer

Limit switch code flashes no inducer motor or ignition starting


usually the main blower runs non stop when limit circuit opens. Shut off the power and check each limit with the wires removed. Use your meter, check the same way as you would check a fuse. Sometimes you can tap on the main limit to reset it. Some secondary limits have a small plastic reset button in between the wires. Check this also.

Nov 27, 2011 | Goodman Heating & Cooling

1 Answer

I turn the thermastat to heat on my goodman gms90904cxa and the inducer fan does not come on and after a couple of seconds the lights blink 3 times


Hello, a 3 blink pattern indicates a open limit switch. Most of the time a dirty filter, dirty blower wheel, weak blower motor, can cause the limit switch to open.

Oct 02, 2011 | Goodman Heating & Cooling

1 Answer

Our furnace went into lock out and so I cycled powere and it reset it started working again but not correctly. The inducer motor wis coming on for a few minutes then the hot ignition comes on and the gas...


Boy it sounds like a high limit opening up and shutting off the gas valve. It won't shut off the blower because it wants to cool off thge furnace. Check for any restriction in the air delivery system, filter, registers. Check for blockage of the exhaust vent.

Jan 08, 2011 | Heating & Cooling

1 Answer

I have a ng furnace downstairs that started this a couple of days aga....It comes on like it is suppose to and runs until it shuts off. Once the blower cuts off it stays off for about 1 second and then...


1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.

Dec 06, 2010 | 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

Bryant Plus 90 Furnace - Blower works fine and intermittently blows warm air but will not bring house to temp set on thermostat... Get a 1-3 error (one blink and then 3 quick blinks of the LED) Thanks


PRSSURE, DRAFT SAFGUARD, AUX-LIMIT SWITCH(WHEN USED)OR BLOCKED VENT
SWITCH(WHEN USED) DID NOT CLOSE OR REOPENED (DOWNFLOWONLY)
If open longer than five minutes, inducer shuts off for 15 minutes
before retry.
Check for:
* proper vent sizing
* defective inducer motor
* restricted vent
* excessive wind
* low inducer voltage(115VAC)
* defective blower motor or capacitor
* defective pressure switch
* inadequate combusstion air supply
* disconnected or obstructed pressure tubing
If it opens after trial for ignition period, blower will come on for
90 sec. recycle delay.
Check your air filter for blockage, check pressure switch for a buildup of moisture. Make sure your inducer motor is turning and creating a vacuum to the pressure switch. Make sure all venting is clear and free of water or debris. Make sure there is no water in inducer motor and all drains are draining.

Jan 28, 2010 | Heating & Cooling

1 Answer

Weathermaker 8000 furnance flashing code 31 blower comes on for 90 sec .. then shuts off .. then other fan goes on.. don't see any flames or lighting goin on can you help?


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 - Disconnected or obstructed pressure tubing
- Low inlet gas pressure (if LGPS used) - Restricted vent
If it opens during blower on-delay period, blower will come on for the selected blower
off-delay.
33 LIMIT CIRCUIT FAULT - Indicates

Nov 04, 2009 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

Unit works with short cycling


sounds like its tripping a limit switch or if it has a flame rod .you may need to clean it. Possibly tripping the high limit due to dirty filter. usually has a diagnostic sheet on one of the panels that will tell you what is going on check the panel you see the light closest to.

PLEASE rate this it matters to fixya alot.

Jan 15, 2009 | Weather King 10AJA3601AH Air Conditioner

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