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Got a salf contained unit PGB36C0702E inducer and blower keeps running and have no 24 volts to board i check all in line limits it all looks fine. put in new board,same thing.the board flashing 4 times.owner has no paper work,on unit,and unit has no info on falt code.can you help.serial no 0011113625

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Make sure you have voltage going into the transformer.

Check the voltage coming out of the transformer. IF you have line voltage but no load voltage, replace the transformer.

If you DO have 24 load V, then look for a blown 3 or 5 amp fuse.

If that is not the problem, jumper out, one by one, individually, each limit and safety switch until you locate the failure. Replace that part.

Posted on Feb 06, 2010

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Draft inducer fault


Pressure switch is not proving that the inducer fan is running. First check to see if draft inducer fan is running that will be the small black fan that is hooked to the vent pipe. If fan is not running then replace fan. If fan is running then check the small rubber tub that runs from inducer blower blower to draft switch make sure the hole in the blower cage is not stopped up with rust you can clear this with a sewing needle. If this is clear then check the pressure switch with a volt meter make sure it is getting 24 volts to the switch and through the switch. If it is getting to switch and not through switch then replace the switch.

Oct 21, 2014 | Dayton Gas Furnace Heater

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Model m1mc 090a bw furnace pressure switch open. inducer motor is pulling .45 w.c . the intake pipe above inducer is only pulling .1 w.c. . checked for venting and intake blockages found non. removed...


did you check the hose from the inducer to the pressure switch? HAVE you unplugged the unit from the wall outlet to reset the board? DO you have a voltmeter? If you do you can run voltage across the switch and if you get 24 volts you are open.

Oct 23, 2013 | Coleman Intertherm Nordyne Miller Furnace...

1 Answer

My burners are not lighting up. circuit board said that my pressure switch was stuck closed, but my induce draft motor will run, hot suface ignitor will lite, and I got 24 volts to my gas valve. I changed...


Hello,
So, 2 things you want to check here-
First, the circuit board that controls that pressure switch can be bad and thus giving a faulty message pointing to the pressure switch, when it really may be the board that is bad.
Second, the pressure switch detects proper pressure for the inducer motor all the way through the venting- it seems like you already checked that but you may want to do a double check( I often over look simple blockages on the termination outside).
Hope this helps, James

Jan 05, 2011 | 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 service a goodmang GMNT 080 furnance and found the fuse blown


Hi, any time you remove the high limit wires the limit switch will show that it is open which starts the indoor blower motor. Your limit was good. It showed it was open on your code chart because the wires were removed. If you are blowing this 3 to 5 amp board fuse, its showing you have a dead short on the low voltage side of the furnace, not the high voltage such as the fan motor would run on. Make sure that the 18gauge thermostat wires coming in to the board are not skinned or have a bare spot touching metal which will cause this. Look it over good where it is pulled through to the board terminals. If it blows as soon as you put a new one in, yes indeed, dead short, 24 volt side. You may have to buy more fuses to find the problem, but any part or safety switch that is 24 volts need to be disconnected until you find the faulty part. Your board could be shorted. Kill the power to the unit. Draw a diagram of the stat wires so you know where they go back. Take them loose. If the fuse holds, the problem will be in the stat wire from there back to the thermostat, and can be the contactor coil shorted on the out door unit or thermostat. After you remove the wires, remove the 4- screws holding the board in. They are ( board ) hard to look at the back side, but work it around to get a look at the circuitry on the back for burned or blacked areas on the board. If there is, the board is the fault. I have seen this many times before. If it is, you may be able to get one at a appliance parts house. Take all model and serial, and board numbers with you. Just keep in mind it is a 24 volt part, control wiring toughing metal, stat, or the board its self. My bet its the control board. Please keep me updated on what you find, and remember to kill power when looking at the back of the board. If I have been of help to you on this, please be kind when rating me as I know you will. I will be here if you need more help.
Sincerely,
Shastalaker7
A/C, Heating, & Refrigeration Contractor

May 27, 2010 | Goodman GMS90703BXA Heater

1 Answer

My York Stellar PLUS furnace (Model P2UDD12N07601C) will not stay on; The ventilator fan runs, the main blower runs, the igniter comes on for approximately ten (10) seconds and you can hear the gas valve...


Check gas pressure, inspect manifold & make sure there is not a blockage.Make sure gas is present and main gas shut off valve to furnace is on also check the knob on the 24 volt gas valve and see if it is in the on position , check the MV terminal on the gas valve to 24 volt common with a volt tester to see if you have 24 volts present, if you do have 24 volts at gas valve, replace valve. if you do not have 24 volts at gas valve check high limit control & roll out limits for a open circuit, Good luck.

Feb 20, 2010 | York Furnace Draft Inducer Blower Fasco #...

1 Answer

Ruud silhouette #UHDG-07EAUER won't heat house


Cleaning the flame sensor has nothing to do with blower motor not turning on. You either one of the following problems 1 bad cap for motor. 2 bad motor. 3 bad limit on blower housing or 4 a bad board. You will need a volt meter to check for these problems. Try seeing if the fans runs with unit of and fan switch turned to on. Also does motor hummmm. Is motor cage free ( can check by manually turning) If motor doesnt humm and the cage is free wheeling then you will need to find out if you have power going to the motor. If you find out that you do then you will need to change blower motor. If you do not have power then you will need to check limit with continuity tester on volt meter. If that checks fine only 1 thing can be wrong and that is the board.

Feb 14, 2009 | Ruud UBHC Air Conditioner

1 Answer

Booster Motor Stayes on after end of heating cycle


Check the following: Flame sensor, this is a lil probe somewhere next to your ignitor. It senses flame and will cause the inducer/booster fan to keep running. Check continuity between your limits on the exchangers, and the main auxilary limit, if a broken circuit then it will also cause the unit to act eratically. If those check out, try your pressure switch, when the heating cycle begins ensure your getting 24 volts in one leg and out the other.

Dec 04, 2008 | Heating & Cooling

1 Answer

MY BLOWER WAS REPLACED IN THE SUMMER BUT IT NEVER TURNED OFF UNLESS WE SHUT IT OFF AT THE SWITCH. NOW I SWITCHED THE TSTAT TO HEAT AND THE INDUCER FAN TURNS ON WITH THE BLOWER BUT NOTHING EKSE TURNS ON. NO...


be sure the fan setting on the stat is set for auto, not on. in this mode the fan should only run when there is a call for cool or heat.if the fan continues to run check at the control board to see if you are getting 24 volts low voltage between green and common. if you are then the stat is bad. if youaren't then your electric control board is possibly bad. a lot of gas furnaces fall into a failsafe mode when a sensor or function fails and the blowers stay on 24 7. you may well have several problems from what you are saying. if you turn everthing off and start a new cycle for heat the first thing that should fire up is the induced draft motor , then the ignotor, then the gas valve. you can check each item with a meter , generally 120 volts to the induced draft motor, then 120 volts to the ignitior, the 24 volts to the gas valve. then ignition and 120 volts to the motor. most furnaces have a heat terminal and a cool terminal on the board. common to heat should get 120 volts on a call for heat after the sequence of operationb has taken place. 120 volts should be sent to cool terminal on a call for cool. a continueous blower is a sign of a failed safety. perhaps the motor failed and the safety opened and the motor was replaced but the safety never reset?. look at all the little micro temp sensors around the burner. they are like little breakers and need to be pushed in to reset . usually like a little stem that pops out from a metal or plastic dic. some are size of a quarter, some the size of a dime.

Oct 29, 2008 | Heating & Cooling

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