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My bryant furnace fan will not turn on. Everything is sequencing, the induction fan starts and the flame lights, but the fan will not turn on. The capacitor reads 4.86 uf. Any suggestions?

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  • 187 Answers

Your fan delay relay is not functioning. On most furnace fan controls, there is a fan delay relay that delay the fan from turning on until it senses the temperature increase, typically around 130 degrees. once the relay senses the temperature increase it closes a contact inside the sensor and turns the blower on. It is the same device that keeps the fan running once the furnace turns off. Just take the Model number and serial number to your local dealer and get a fan delay relay and replace it.

Posted on Dec 11, 2014

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Posted on Jan 02, 2017

Therinnaiguy
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SOURCE: Ruud Furnace won't turn on

Take of the access panel on the furnace and look for a wiring diagram either on the back of the panel or inside the housing. There will be a diagnostic chart on it that will give you a hint what 2 flashes mean. I think it is a "no Ignition" code. If it is, with the access panel off and the door switch taped in the closed position, the furnace will try to start if the thermostat is calling. You want to look at the control module to see if it is flashing, then you should notice a small fan that pushes out the combustion products start to turn. Then if you look in a small view port, you should see an orange glow followed by a clicking noise at the gas valve. Then you should notice a blue flame in the view port. This flame must stay on for 5-6 seconds or the unit will turn it self off. If one of these do not happen, you will need a technician to troubleshoot it. Check to see if all wires and hoses are tight and in place. Make sure your condensate hoses are not blocked and free of water. Make sure there is no blockage in your vent pipe(s). 

 

Let us know what you found. 

Posted on Oct 12, 2007

wbwill
  • 68 Answers

SOURCE: Carrier Weathermaker SX model 58SX060-CC Blower runs all the time

Remove all power from the furnace, it is likely the brain in the furnace is need of being reset, from the battery replacement, why did you change the battery, was there an indicator telling you to change it?

Many times just removing all the power to the furnace will do the trick with a reset, if not let me know and we will go from there, but it sounds like the main brain is confused or bad, more likely confused, so try the power removed first.

Than let me know wbwill@sbcglobal.net

Posted on Nov 22, 2008

  • 2 Answers

SOURCE: Rheem gas furnace pilot lights, but no burners or fan

If the burners do not fully ignite, the sensor will shut the furnace down. The lack of sufficient burner flame is a gas valve or gas pressure problem within the valve.
Replacing the gas valve with the original one may get you going. I surely suggest a professional service company for safety reasons and a thorough inspection. A 20 year old furnace is past it's normal life span.

Posted on Jan 06, 2009

electrodynam
  • 35 Answers

SOURCE: bryant furnance clicking, won't fire

try checking the pressure sensing switch,it has a tube that should run somewhere close to the inducer fan.sometimes this hose fills with liquids,and makes the units act funny.I don't know if you have a condensing unit or what.the furnace wont try to light if it cant tell the inducer motor is running.any induced draft unit will work this way.you can also do a temp. bypass of the pressure switch to make sure the contacts on it are closing just be sure your inducer fan is running,and you cant leave it like that its just a test.that is a safety feature you really need.

Posted on Mar 19, 2009

  • 1 Answer

SOURCE: Why Wont My Bryant Furnace Stay Running

You have a dirty flame sensor, it needs to be replaced

Posted on May 03, 2009

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Tractorman44 thanks but misunderdstood husband! When thermostat turned up the fan comes on before flames ignites. Plenum heats and furnace runs.


If the fan comes on first, then the flame ignites, it USUALLY indicates there is a problem in the ignition process of the furnace. Most new manufacturers have the adjustable 'time off' sequence for the blower, and most initiate a call for the blower to run within a pre-determined amount of time AFTER a call for heat has been established. ALSO, and this is where I think the problem is, the ignition sequence starts immediately upon a call for heat. If there is a heat ignition failure, it will attempt a restart. USUALLY, they allow 5 restarts within a certain timeframe then the circuit board locks out the heat sequence until it is reset by cycling the power or cycling the thermostat manually.

What I think is happening with yours it that your ignition sequence is experiencing a 'flame failure' upon a call for heat....then it re-establishes the ignition sequence, which takes another 30 to 45 seconds. During this time, the blower automatically starts (because the allotted time has expired) and blows COLD air because of the initial flame failure. In the meantime the ignition sequence establishes a flame on the second or possibly the third try and then you feel the warm air.

IF this is the case, ultimately what will happen is that the furnace will continue to experience 'flame failure' and eventually fail to the point of 'flame failure lockout' and you will have no heat, but the fan could possibly run continuously.

At any rate, without being able to be there to troubleshoot and test components physically, this is just a calculated and reasonably reasonable guess. What it is telling you is that you probably need to contact a reputable, reliable service organization to give your furnace a good going over before it lets you down on a good cooooold night!!!

I hope this helps you understand the basics of what happens within the system and bear in mind, this is a 'generic' sequence and possibly NOT the exact sequence of your particular furnace.

Oct 01, 2015 | Heating & Cooling

1 Answer

Carrier troubleshooting furnace


If the thermostat isn't selected for "FAN" then the relay is stuck. In heat mode the thermostat opens the gas valve and starts the igniter and the induction motor. If the induction fan isn't running, the flame will stop.

Jan 28, 2014 | Office Equipment & Supplies

1 Answer

My York furnace sometimes doesn't completely ignite


A noisy inducer probably is headed for replacement.

The igniter can produce a healthy glow and still be defective. Mine had to be replaced with a new, improved one.

The thermocouple could be defective even though it seems to open the gas valve when it should.

The heat sensor in the bonnet could be defective. That controls main blower operation.

The heat exchanger could be cracked.

Jan 10, 2014 | Heating & Cooling

1 Answer

My heil n9mp2 isnt working just hums


is the flame igniting and then cutting off? on a gas furnace, the induction fan motor(draft motor) should start first (if the furnace is so equipped), then the flame, then the blower. if you have an induction motor (flue gas exhaust mmotor) this may be your problem (the induction motor isn't starting), if your unit doesn't have one, have you checked to see that you have gas? finally, the capacitor on the blower motor may be causing the motor not to start.

Jan 06, 2013 | Heating & Cooling

2 Answers

Bryant furnace plus 90 led code is blinking once then 3 times fast. What does it mean?


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.

Jan 31, 2011 | Heating & Cooling

1 Answer

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.

Jan 22, 2011 | Heating & Cooling

1 Answer

Induction fan motor cycles on and off , with no call for heat


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


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.

Nov 26, 2010 | Heating & Cooling

1 Answer

Rheem 3204-80D furance. Turns on and fan starts. Then in about a minute the fan shuts off.


Problem: Your furnace will not ignite the gas to produce heat for your home. When a furnace has a bad ignitor what I see most of the time is the following sequence of operation:


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.

Nov 26, 2010 | Heating & Cooling

3 Answers

Code #33 on Bryant 355MAV 90i Furnace


'Limit or flame rollout switch is open'. In my case, the flame rollout switch had tripped due to an overheating? I had to push the button between the wire leads to reset the switch. Then when I turned the power back on, the furnace started up like normal.

Why did the switch overheat and trip? My current theory is that there was a rubber grommet around a pipe near the switch that had slid down and was no longer sealing the furnace?

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2 Answers

Why Wont My Bryant Furnace Stay Running


Look on the blower door panel in the wiring diagram there should be a flash code but it sounds like the flame sensor is not picking up the flame and you may be able to clean it

Oct 28, 2008 | Heating & Cooling

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