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Furnace lockout The problem I have been experiencing is the furnace will enter a lockout mode. That is, if the furnace attempts to start as a result of the thermostat command (below set temp), it will fail to start properly. I can immediately reset the furnace (wall switch off and on) and it will start without any issues. I have cleaned the flame sensor several times with no luck. Is there anything else I can do before I call the technician? Thanks

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  • Heating & Co... Master
  • 2,458 Answers

Change the flame sensor, check the connections on the sensor are tight , check pressure switch , check air filter is clean .

Posted on Jul 05, 2017

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

22yooper
  • 828 Answers

SOURCE: Carrier Weathermaker gas 8000 will not ignite

Your hot surface igniter may be bad. It may be cracked which would prevent it from starting the burner flame.

Posted on May 22, 2008

Therinnaiguy
  • 1420 Answers

SOURCE: Goodman GMS90904CXA Wont ignite, light blinks 3 times

Ok, you either have a inducer fan issue or a pressure switch issue or a plugged vent pipe. The inducer turns on to establish a draft for the exhaust. If it is not working you will get this error code. If the pressure switch does not sense pressure caused by the inducer, it will give this code. If either the intake pipe or exhaust pipe is blocked (even y just a little) it will give you the same error code. If the condensate hose or receptical is plugged, again it will give you this error code. Good Luck!

Posted on Oct 21, 2008

rayname
  • 70 Answers

SOURCE: Goodman GMNT furnace goes into 'lock-out'.

check to see if your intake pipe or vent is clear this could cause a flame jump and make it look like a bad flame sensor let me know if this helps

Posted on Jan 08, 2009

  • 1 Answer

SOURCE: Thermostat seems to be working, furnace does not always turn on

i need help rplce thrmostat with a digital braueburn my furnance wont turn on no flashing lights cant reset the burner though has power what do i do shoul i reset the circut breaker that was never tripped though

Posted on Jan 26, 2009

mrgrzz
  • 88 Answers

SOURCE: Where is flame sensor on my old oil furnace?

Thanks for your question,
The flame sensor eye is located just under the transformer, it is looking straight down the burner assembly to where the burner chamber is at, you will have to remove the entire assembly to get to it, first make sure the power is off, remove the transformer, then remove the entire burner assembly from the furnace cabinet, once removed you can see the flame sensor window, use a clean oil free cloth to clean it, it would probably be a good idea while you have it out to replace the burner nozzle, as over time they will clog, I hope this helps you fix your oil burner, let us know and rate this please, thanks again,
mr.grzz

Posted on Jan 27, 2009

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A 13 code means the furnace cycled on limit more than three times consecutively and is in a lockout for 3 hours. A 14 is ignition lockout. An ignitor does not intermittently quit working. I'm the service mgr at our shop, and I know that particular furnace model has a service bulletin out on bad secondary heat exchangers. If your lucky the filter is dirty, or the furnace condensate trap or drain is clogged. Most likely the secondary heat exchanger is plugged up and isn't allowing the pressure switch to make. Or the furnace is overheating due to it not being able to properly vent hot gas. Which would explain the high limit lockouts. Call an authorized carrier dealer so you can take advantage of the free heat exchangers and the $300 labor credit. You can also call an authorized Bryant dealer to perform the work for you. Only an authorized dealer can rectify this problem because the Bryant corp requires testing and paperwork in order to get your free parts and labor credit.
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Hello. a soft lockout typically happens when

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Since your burners are not igniting I would check the pressure switch, make sure there is no obstruction in the flue pipe, the hose going from inducer to pressure switch is not kinked, loose, obstructed, or have water in it. If that all checks out good then your pressure switch is bad and must be replaced. If you need any further assisatnce let me know

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