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My Lochinvar WHN155 is Lockout on gas pressure switch. I tried reset button but it tries to start then goes right back into lockout mode. The jumper is in, I have gas pressure, the gas pressure switch is on and the lines are connected and plugged in tight. How do I fix?

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Check draft vent for clogged

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What do I try when my lochinvar spa heater says lockout ignition failure


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Hello, I have a Lochinvar ern 252, it was working great last season and was winterized properly... I just open the pool and now it is reading lockout ignition failure.... I can smell gas when it goes into...


two things, is it a spark igniter or hot surface?
if spark igniter is working then the pilot tube or fuel path to the igniter is plugged, a lot of times small spiders or insects will winter over in these tubes, build a small web or cocoon that restricts gas flow to the igniter. OR hot surface igniter not hot enough and will not lite the gas. can be tested with an amp probe or just replaced .

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Furnace gas valve is not opening


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.

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My heat-pump went into lockout due to low water pressure. The pressure is back up to 50psi. After shorting between the test pins, the unit starts but the status light still flash about every 10 sec and...


the unit has a hi pressure safty switch on it, probally has a red push button on top. when the water slows down or stops the hi pressure trips to shut unit down to prevent compressor damage, the switch does not reset it self, find it in the outdoor unit and reset it, let me know. thanks wally.

Mar 11, 2011 | Heat Controller 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.


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Kelly

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2 Answers

When firing the lochinvar knight boiler it went to "man reset high limit" on computer and says LOCK OUT !?!? is it air locked? the pump in on the supply side instead of the return side. does that make a...


This kind of Manual High Limit issue can most likely be caused by two things :

1) If it's a Knight XL (399MBH and up), it's equiped with a manual high limit with is located in front of the boiler, behind the front panel just under the display bezzel. It has to be adjusted and reset (with the manual reset button on the control display).

2) If your unit is NOT equipped with that kind of Manuel High Limit, this message means that there was a low voltage wire that was shorted to the ground. Either the flow switch or the thermostat wire. The 24v fuse located on the main control board burned to protect the components. Lucky, Lochinvar provide replacements in the small plastic bag attached to the connection board.

Hope this help. Even if i'm late.

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Once you try to ignite three times in succession, and the heater doesn't sense the presence of flame, the heater goes into "lockout" mode and must be reset to fire. This can be done by pressing and releasing the mode button so that the heater is turned off then returned to the desired mode. So if you were going to "jumper" the pressure switch, (connecting two wires together) make sure you do the reset also. Make sure you don't operate like this, if your pump quit, you could have a melt down. Also If you have anything connected to the fireman switch, it is in series with the pressure switch,and woud display the same thing. There is a terminal with two white wires, if there is a jumper there, then nothing conected, but if there is something connected, make sure it is closed. Also be sure your code was for Water pressure and not air pressure switch. You can download manuals at: www.jandy.com

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3 Answers

Fault code says pressure switch lockout


This more often than not, indicates that your pressure switch is gone and needs to be replaced. Watch the YouTube video for a fuller explanation and heed the warning to use OEM parts! Gas Furnace Pressure Switch Failure and Replacement Amazon com gas furnace parts

Feb 06, 2010 | Heating & Cooling

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