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My concord 90 plus furnace wont turn on the led light blinks 6 times

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 7 Answers

SOURCE: 6 blinks

sounds to me like i wish i could find out if this is new install or if the electric has been changed recently,,,sounds like reversed polarity on the plug,,,which means the white and black wires need to be swapped. If there has not been change recently than u need to see the other post i made on goodman about the combustion fan motors and there types and fixes. But almost certain that is reversed polarity. good luck

Posted on Oct 25, 2008

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  • 582 Answers

SOURCE: I have a Ruud 90 Plus Model UGRA furnace and blower starts immedi

NO BECAUSE THE BOARD IS TELLING THE FANS TO STARTARE THE CONTACTS FUSED TOGETHER OR STUCK IN THE CLOSED POSISTION CHECK THIS FIRST

Posted on Aug 10, 2009

Therinnaiguy
  • 1420 Answers

SOURCE: Bryant Plus 90 Furnace - Blower works fine and

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.

Posted on Jan 28, 2010

  • 266 Answers

SOURCE: I turn the thermostat on

This on blink of the light is a system lockout. It is caused when no gas is released to light the burner. The first thing to try is to turn the power off to the unit make sure your thermostat is off also. Turn the unit back on and make sure your gas is turned on. Then turn on the thermostat. Try this 3 or 4 times to make sure there is not air trapped in the gas line preventing ignition. If it lights after doing this you should check for a small gas leak at all fittings and shut off valves. The reason for this is to make sure you do not have a slow leak. If you smell gas turn off the furnace and your gas main valve and call a repair person. If you are unable to turn off the gas you should call the utility immediately. The cycle for your furnace is as follows. When your thermostate demands heat a signal is sent to your circuit board in the furnace and it turns on a exhaust fan to cause a draft to push air out the flu. (this fan is on 92% and higher funaces) This fan has two vacume lines that run to two vacume switches one is for the presence of vacume the other is for sensing the release of vacume. These are low voltage switches hooked into the 24v system. If the fan works and the switches sense vacume it then turns on the gas igniter this will be a glow bar and you will see it glowing. This in turn has a sensor that near it that can sense the heat from the glow bar igniter and it in turn turns on the gas by sending the 24v signal to the gas valve. If after 8 to 15 seconds the flame does not come on the system will reset and try again for a total of 3 times. If any of the above systems do not work your furnace will lock out because it thinks there is gas being dumped into the furnace. If the exhaust fan comes on you have 24v going thru your thermostat to the furnace. Then the vacume switches have to work. One is normally open the other normally closed. If you have a volt/ohm meter which can be purchased for as little as 10 to 15 dollars at a hardware store you can check these switches. You will need to set the thermostat to off and turn off voltage to your furnace for safety. Then locate the two switches by following the black rubber vacume lines from the exhaust fan housing to the switches. Pull the wires off the switches and with the meter set on ohms place the leads on the two terminals. While the meter is hooked up pull the vacume line off the fan housing and **** air in and out of the line the meter should swing back and forth as it senses vacume and the lack of it. If it does it is working. Then do the other vacume switch. Make sure to keep your wires and where the vacume lines go straight. You will also see a sensor mounted above and center where your burners are at it will have two wires going to it and it will be round it should show continuity ck it by removing the wires form it and touching the meter leads to the connectors the meter should respond showing continuity. There are two others under the burners on each side ck them the same. If any of your sensors have a pop ot button in the center press in on it yours should not this is an older version yours should be self reseting. The only other sensor is located in the blower for circulating the air. It is located on the right hand side of the blower housing with a red and yellow wire going to it. It has a reset in the center this sensor is used to trip if the heat in the blower housing gets to hot. This happens when the blower motor quits or is not able to move air fast enough due to restrictions. If the sensor has tripped you will feel and should hear an audible click when you press on the center button also if you check it for continuity it will show none and when you press the button it will show continuity. The next thing is the gas valve If all of the above work it is either the gas valve not opening or your circuit board. All of the parts are inexspensive until you get to the circuit board and the gas valve. The gas valve should be replaced by a repair person. You can replace everything else just make sure you turn off the power and pay close attention to the wiring. I hope this helps good luck. But not to down play the above make sure te top panel is in place put your hand on the gas valve and have someone turn on the thermostat. If the exhaust blower comes on and the ignitor glows you should then feel a click from the gas valve if you do not it us normally the circuit board. If you do and it still doesnt light you have no gas coming to your furnace. I hope this helps good luck

Posted on Sep 11, 2010

  • 117 Answers

SOURCE: bryant furnace plus 90 led code is blinking once

these codes are on the inside panel of the front cover of the furnace. lift off and look inside.there should be a code explain chart on the panel by the light. this panel will need to be replace correctly for the furnace to work as there is a door switch.

Posted on Feb 01, 2011

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I have a Rheem Furance that has turned off. Just a few hours ago the main fan turned off. The Furnace doesnm't light even the draft fan does turn on and then the main fan blower motor turns on. I can hear...


You will need to reset the furnace by turning the power off to it. Then as the furnace tries to light, watch the LED for blinking. Hopefully it will give a code other than 1. Try checking the air filter for blockage, make sure all hoses are free of moisture and any drains are not blocked. Check the air intake and exhaust pipe for sags where water could block it.

The sequence of operation is this:
Thermostat calls for heat, the LED may blink telling you it registers the call. The inducer (exhaust) blower starts closing contacts in the pressure switch (small disc shaped thing), the igniter glows orange (seen thru a small window high up on furnace front), gas valve opens allowing main burner to light, flame travels to all other burners, flame rod senses flame within a few seconds and keeps gas on. Room air blower starts within 90 seconds.

Any deviation or delay in this sequence and it goes into lock-out.

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Ruud achiever 90 plus won`t start


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1 Answer

Ruud achiever 90 plus blower not working


does the furnace ignite?? your system may not have been lighting and has gone into ignition lockout count the codes of the led lights then remove panel led diagnostic codes are listed there.
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4 blinks is "pressure switch closed" there are 2 in the system according to the wiring diagram one for the vent system  and one for the drain system ... I just wiggled them and heard one "click" the fault light quit blinking and when I pushed the safety switch back in the furnace fired right up.  That being said is there a good website for learning how to maintain your own furnace?  I'll call a pro if I have to, but shoot I can fix a jet engine... this shouldn't be much worse.
Thanks  dan

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