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Blower fan stays running. Fan relay attached to small circuit board (coil tabs [timer?]). Capacitor on small circuit board had ''fallen out'' of ic board. Tried to get replacement board, and was sold just a standard relay - told that relay alone replaced the previous relay -and- circuit board configuration (?). Problem still exists (no change). Also changed thermostat just to eliminate as a possible cause, but seems like problem must be in the fan relay area. Question about the wires attached to the relay also.

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  • ron_allen200 Apr 24, 2009

    Anyone there?

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    What kind of air handler is this?

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  • Master
  • 1,099 Answers

If fan runs on 220 you have one constant 110 that always goes to the motor. The other 110 goes through something that will turn it off and on. This being the relay, just like a light switch. This 110 will land on the "N O" (normally open) set of contacts. "Open" meaning the voltage can't pass through. When the relay gets energized the contacts close. This completes the circuit, the motor gets the 220 it needs and it runs. On the relay coil (how it gets it's energy) you need a low voltage common and you need the "G" wire from the tstat. Likely green in color, this is your indoor blower low voltage wire. When the tstat calls for fan, cool or heat, the relay energizes, closes the contacts, fan runs. Good Luck!!

Posted on May 16, 2017

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Posted on Jan 02, 2017

  • 38 Answers

SOURCE: Blower fan runs continually.

Dear excide,
The blower fan is not controlled by thermostat. The thermostat only cuts off the supply to compressor when the desired temperature is attained.To switch off the fan you have to switch off the supply to ac.
ramesh22

Posted on Jun 25, 2008

burzerko
  • 254 Answers

SOURCE: HELP!!! Help wiring new motor for CKL60-1

  1. This is what your wiring should look like if you are using two caps. then you should be using a potential relay as well. This is the diagram for using a potential relay. Hope it helps you.
Thank Youe461749.jpeg

Posted on Aug 28, 2008

farfield
  • 462 Answers

SOURCE: RV AC, how to wire fan (blower) motor to capacitor.

You almost have it Look closer at the run capacitor. It has Herm, this is for the compressor, Com or C and F or Fan.

1 of your power wires is the fan speed so connect them accordingly usually black is hi, blue med, & red is low. You are "feeding" voltage to the selector switch on 1 side and coming out to the fan motor speeds.

Next you have a "Common" wire on your fan motor (this means its Common to all the other connections inside the fan motor to me. It is usually white. Connect this to the other line of power usually the Com on the capacitor unless it connects to a strip on the selector switch. But 1 of these 2 places will be the other side of your Power when plugged in. Lastly the brown it is usually the fan capicator only wire and it will connect to the fan "F" terminal on the capicator this terminal will not have any other wires connected to it.

This should make you a happy camper. Please rate me accordingly and good luck.

Posted on Mar 08, 2009

  • 659 Answers

SOURCE: mastercool swamp cooler fan doesnt come on.

Are the relays perment on the board or are they seperate from the main board? If they are mounted to the board, you will need to replace the board. Sounds like you are getting a call to the relay but none leaving so this would indicate that you have a bad relay switch.

Posted on Mar 21, 2009

  • 400 Answers

SOURCE: Dometic Duo-Therm - 13,500 B.T.U. Model #3107541.009 - Serial # WA346967 - Yr. 1999-2000. Blower motor will not start. Replaced the start capacitor - no help. It will run by spinning the motor by hand

Yes you should try replacing the run capacitor.

Posted on May 08, 2009

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You need a simple relay. But, if you want it to run and never stop temporarily, take the black wire off the relay on the board ( the wire that goes back to the 240 side of the transformer and run it straight to the speed tap from the motor that's connected to the relay. I'll help you with the relay when you get when but this will make it run provided the board or relay is bad.

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1. DIRTY CONDENSER - CLEAN THE CONDENSER COILS AND FAN
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Why heater fan will not come on?


Wish I knew how old your furnace is. Let me answer your question directly. In the heat mode the fan runs independently from the air conditioning fan relay. Its either brought on by time or temperature. An old furnace will use a fan and limit control that uses a coil to sense the heat exchanger temperature and turn the fan on or off. Newer furnaces use a timer on a circuit board. 20 years or newer Ill bet its a timer board. Follow the blower motor wires back to the component and ill bet that's the culprit. Hope it helps. Good luck.

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Replaced a circuit breaker on our heat pump our air goes off right but the blower stays on what could be wrong


The blower relay (called a fan relay) is stuck and must be replaced.
Want to do it your self? Trace the two power leads from the blower motor. usually white and black for high speed, White and red medium.
(Blue,purple and brown are capacitor colors)the white wire goes to the line side of the contactor. the black or red wire goes to the fan relay. This arrangement allows the blower to continue running for a minute after shut down to dry the cooling coils or complete the heating cycle. (Line side is where the incoming power wires connect)

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Capacitor Failure Symptoms are sometime harder to identify without the right tools and expertise. Capacitors can be found in several different sizes and shapes. There may be one or multiple capacitors included in your ac with regards to the design. While the most popular capacitors are the types found on circuit boards, the ones most associated with air conditioning will be the bigger capacitors that assist start and run your motors. There are several motors present in an conditioner and heater systems:
  1. Compressor Motor Run Capacitor: Here is the most popular capacitor that fails. Most of the time these are duel capacitors, which means that there are 2 capacitors built into one. A duel capacitor will have three terminals on the top where a single capacitor will simply have two terminals on top.
  2. Outside Fan Motor Run Capacitor: That is the smaller capacitor found with or part of the Compressor Motor Capacitor. It helps start and run the outside fan that blows air through the outside coils.
  3. Indoor Blower Motor Run Capacitor: Similar to the outdoor fan motor capacitor, it is a small, single (two terminals) capacitor that will help start and run the indoor blower motor.
  4. Start Capacitor: Some models include an auxiliary start capacitor that helps jump start the motors. Most are found on the compressor. These are less common.

You may need to get that checked out.
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1 Answer

I have a goodman ar24-1 blower motor that will not start. I have changed the capacitor, checked the thermostat, spun the blower motor but still will not start. Outside unit runs but no blower. Any ideas?...


Check the relay or sequencer that controls the blower if it has one of those. If the fan is controlled by a circuit board then you problem may be there. If it is controlled by a circuit board then you can check for power at the fan connection when the fan is supposed to be on. Then there is always the possibility that you blower motor is burned out. You can use and ohmmeter to check the motor windings. You said you checked the thermostat, how did you do that? If you install a jumper between the R and G connections the fan should run if everything else is OK.

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Fan does not cut off when thermostat is on automatic


Continuous fan when thermostat is in automatic means one of 2 things...

a stuck blower relay/timer or a safety is open resulting in onstop fan. If all other functions work, and the this is a new issue, then the relay controlling the fan is welded shut.

On some units it is a relay built on the circuit board. Others, like an electric furnace can have a stand alone relay bad.

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If the indicator light is on, it means the board is sending the signal, first, check wiring for loose or disconnected terminals to the blower fan Relay, (welded on the circuit board), also, check Relay, you should hear a click everytime the fan button is pressed. If Relay is OK, check capacitor, with power disconnected from wall, discharge capacitor touching terminals w/screw driver, using a multimeter in the Farads function, touch both therminals and compare result with capacitor label. If capacitor is double, (three prongs) check between the one that says Fan and the one with the letter C. The terminal labeled Herm, is for the Compressor. On this type of capacitor it should have something like 5/35 uF + - 5%. the small number refers to the fan motor and the big number refers to the compressor, so the reading you should get should be 5 (+ - 5%) which means 4.75 min. - 5.25 max.

80% of the time. the source of this type of problem rests in the above mentioned components, I am pretty confident that is the source of your problem.

Don't forget to rate this post, Good Luck.

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RHEEM OIL FURNACE MODEL ROBD 067 LBEA BLOWER


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1 Answer

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