Discuss

Furnace fan speed relay

 in

Heating, Ventilation, and Air Conditioning (HVAC)

. "

OK.. I got a call from my mother that her AC isn't cooling off the house. I have no errors

..."
 
 
Register | FAQ's | New Posts | Today's Posts | Extras
Appliance Repair Forum > Appliance Repair Help > Heating, Ventilation, and Air Conditioning (HVAC) » Furnace fan speed relay

Post New Thread  Reply By reading any content on this site you agree to AppliancePartsPros.com, Inc. disclaimer and Terms of Use.
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 07-11-2012, 10:56 AM
Junior Member
 
Join Date: Jul 2010
Posts: 5
BobRegal is on a distinguished road
Question Furnace fan speed relay
Model Number: Bryant 383kAV   Brand: -other-   Age: 5 - 10 years   

Appliance Parts from AppliancePartPros.com


OK.. I got a call from my mother that her AC isn't cooling off the house. I have no errors on the furnace. The furnace appears to be wired properly, as well as the thermostat. What I am seeing, and what the diagrams read, When the furnace is heating the house, the relay sends the current to the blue wire, Medium/Low fan speed, and when Cooling, to the black wire for high speed. The furnace fan is only spinning one speed.. and I am assuming it's medium/low...
From the diagram... I don't understand how the speed control of the fan happens. The SPDT relay sends the voltage to the blue wire, hence medium/low speed... and when cooling, the voltage is sent to the black wire, hence High speed.
My question:
Is the speed control in the motor? Blue wire medium/low and Black wire High... or is it in the relay... partial voltage to the blue wire, then the relay adds voltage to the black wire, sending voltage to both the black and blue wires for high speed?









Related Models
Amana BS20RB REF - BOTTOM MOUNTS
Amana BS20RBL REF - BOTTOM MOUNTS
Amana BS20RBW REF - BOTTOM MOUNTS
Admiral BS24X8D3V REF - SXS/I&W
Maytag BS24X9DB REF - SXS/I&W
Maytag BS24X9DK REF - SXS/I&W
Maytag BS24X9DV REF - SXS/I&W
Maytag BS24X9DV REF - SXS/I&W
Maytag BS24Y9DB REF - SXS/I&W
Maytag BS24Y9DBC REF - SXS/I&W
Maytag BS24Y9DV REF - SXS/I&W
Whirlpool BSG17BVANA0 27" GAS DRYER (ATIVE)
Bosch BSG81215 UC/01 
Bosch BSG81265 UC/01 
Bosch BSG81296 UC/03 
Bosch BSG81360 UC/03 
Bosch BSG81370 UC/03 
Bosch BSG81380 UC/03 
Amana BSS207 ELE CARTRIDGE
General Electric BSS25GFPACC Refrigerator
General Electric BSS25GFPAWW Refrigerator
General Electric BSS25GFPCCC Refrigerator
General Electric BSS25GFPCWW Refrigerator
General Electric BSS25GFPDCC Refrigerator
General Electric BSS25GFPDWW Refrigerator
General Electric BSS25GFPECC Refrigerator
General Electric BSS25GFPEWW Refrigerator
General Electric BSS25GFPHCC Refrigerator
General Electric BSS25GFPHWW Refrigerator
General Electric BSS25JFRFWW Refrigerator
General Electric BSS25JFRJWW Refrigerator
General Electric BSS25JFTAWW Refrigerator
General Electric BSS25JFTBWW REFRIGERATOR T SERIES
General Electric BSS25JFTCWW REFRIGERATOR T SERIES
General Electric BSS25JFTDWW REFRIGERATOR T SERIES
General Electric BSS25JFTEWW REFRIGERATOR T SERIES
General Electric BSS25JFTGWW REFRIGERATOR T SERIES
General Electric BSS25JFTHWW REFRIGERATOR T SERIES
General Electric BSS25JFTIWW REFRIGERATOR T SERIES
General Electric BSS25JFTJWW REFRIGERATOR T SERIES
General Electric BSS25JFTNWW REFRIGERATOR T SERIES
General Electric BSS25JFTPWW REFRIGERATOR T SERIES
General Electric BSS25JSRFSS Refrigerator
General Electric BSS25JSRJSS Refrigerator
General Electric BSS25JSTASS Refrigerator
General Electric BSS25JSTBSS REFRIGERATOR T SERIES
General Electric BSS25JSTCSS REFRIGERATOR T SERIES
General Electric BSS25JSTDSS REFRIGERATOR T SERIES
General Electric BSS25JSTESS REFRIGERATOR T SERIES
General Electric BSS25JSTGSS REFRIGERATOR T SERIES
General Electric BSS25JSTHSS REFRIGERATOR T SERIES
General Electric BSS25JSTISS REFRIGERATOR T SERIES
General Electric BSS25JSTJSS REFRIGERATOR T SERIES
General Electric BSS25JSTNSS REFRIGERATOR T SERIES
General Electric BSS25JSTPSS REFRIGERATOR T SERIES
General Electric BSY25GFMCCC Refrigerator
General Electric BSY25GFMCWW Refrigerator
General Electric BSY25GFMDCC Refrigerator
General Electric BSY25GFMDWW Refrigerator
Magic Chef BT16JA-3 RV RANGE- GAS
Magic Chef BT16JA-3T RV RANGE- GAS
Magic Chef BT16JA-3Z RV RANGE- GAS
Magic Chef BT16JA-4 RV RANGE- GAS
Magic Chef BT16JA-4T RV RANGE- GAS
Magic Chef BT16JA-4TZ RV RANGE- GAS
Magic Chef BT16JA-4Z RV RANGE- GAS
Magic Chef BT16JK-3 RV RANGE- GAS
Magic Chef BT16JK-3T RV RANGE- GAS
Magic Chef BT16JK-3Z RV RANGE- GAS
Magic Chef BT16JK-4 RV RANGE- GAS
Magic Chef BT16JK-4T RV RANGE- GAS
Magic Chef BT16JK-4TZ RV RANGE- GAS
Magic Chef BT16JK-4Z RV RANGE- GAS
Magic Chef BT16JS-3 RV RANGE- GAS
Magic Chef BT16JS-3T RV RANGE- GAS
Magic Chef BT16JS-3Z RV RANGE- GAS
Magic Chef BT16JS-4 RV RANGE- GAS
Magic Chef BT16JS-4T RV RANGE- GAS
Magic Chef BT16JS-4TZ RV RANGE- GAS
Magic Chef BT16JS-4Z RV RANGE- GAS
Magic Chef BT16KA-3 RV RANGE- GAS
Magic Chef BT16KA-3S RV RANGE- GAS
Magic Chef BT16KA-4 RV RANGE- GAS
Magic Chef BT16KA-4S RV RANGE- GAS
Magic Chef BT16KA-4ST RV RANGE- GAS
Magic Chef BT16KA-4T RV RANGE- GAS
Magic Chef BT16KK-3 RV RANGE- GAS
Magic Chef BT16KK-3S RV RANGE- GAS
Magic Chef BT16KK-4 RV RANGE- GAS
Magic Chef BT16KK-4S RV RANGE- GAS
Magic Chef BT16KK-4ST RV RANGE- GAS
Magic Chef BT16KK-4T RV RANGE- GAS
Magic Chef BT16KN-3 RV RANGE- GAS
Magic Chef BT16KN-3S RV RANGE- GAS
Magic Chef BT16KN-4 RV RANGE- GAS
Magic Chef BT16KN-4S RV RANGE- GAS
Magic Chef BT16KN-4ST RV RANGE- GAS
Magic Chef BT16KN-4T RV RANGE- GAS
Magic Chef BT16KS-3 RV RANGE- GAS
Magic Chef BT16KS-3S RV RANGE- GAS
Magic Chef BT16KS-4 RV RANGE- GAS
Magic Chef BT16KS-4S RV RANGE- GAS
Magic Chef BT16KS-4ST RV RANGE- GAS
Magic Chef BT16KS-4T RV RANGE- GAS
Magic Chef BT16LA-3 RV RANGE- GAS
Magic Chef BT16LA-3Z RV RANGE- GAS
Magic Chef BT16LA-4 RV RANGE- GAS
Magic Chef BT16LA-4T RV RANGE- GAS
Magic Chef BT16LA-4TZ RV RANGE- GAS
Magic Chef BT16LA-4Z RV RANGE- GAS
Magic Chef BT16LK-3 RV RANGE- GAS
Magic Chef BT16LK-3Z RV RANGE- GAS
Magic Chef BT16LK-4 RV RANGE- GAS
Magic Chef BT16LK-4T RV RANGE- GAS
Magic Chef BT16LK-4TZ RV RANGE- GAS
Magic Chef BT16LK-4Z RV RANGE- GAS
Magic Chef BT16LN-3 RV RANGE- GAS
Magic Chef BT16LN-3Z RV RANGE- GAS
Magic Chef BT16LN-4 RV RANGE- GAS
Magic Chef BT16LN-4T RV RANGE- GAS
Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
  #2 (permalink)  
Old 07-11-2012, 03:04 PM
Simon / APP Team's Avatar
Expert
 
Join Date: Feb 2012
Posts: 5,250
Simon / APP Team will become famous soon enough
Default

Hi.

While the AC is running pull the black wire off the control board (be very careful not to brake or short anything). If the blower stops - it's OK.

There are other things to check: first of all the freon pressure, the air filter. If you don't have the gauges touch the thick copper pipe - must be sweating and dripping condensation. If it's not - there is the sealed system problem.

When testing keep the FAU closed.

Thank you.

Simon.
__________________
Find Appliance Parts at AppliancePartsPros.com - Largest inventory in the U.S. with 91% of all in-stock orders delivered within 2 business days. Thousands of photos and diagrams make it very easy to find the right part. Enter your appliance model here.
Reply With Quote
  #3 (permalink)  
Old 07-15-2012, 03:57 PM
Junior Member
 
Join Date: Jul 2010
Posts: 5
BobRegal is on a distinguished road
Default

When I took off the inspection cover, the copper coils on the ends had condensation, but nothing on the fins at all... Maybe it needs a shot of freon... guess I will have her call for a check-up.
Thanks!

Quote:
Originally Posted by Simon / APP Team View Post
Hi.

While the AC is running pull the black wire off the control board (be very careful not to brake or short anything). If the blower stops - it's OK.

There are other things to check: first of all the freon pressure, the air filter. If you don't have the gauges touch the thick copper pipe - must be sweating and dripping condensation. If it's not - there is the sealed system problem.

When testing keep the FAU closed.

Thank you.

Simon.
Reply With Quote
  #4 (permalink)  
Old 07-16-2012, 10:31 AM
Simon / APP Team's Avatar
Expert
 
Join Date: Feb 2012
Posts: 5,250
Simon / APP Team will become famous soon enough
Default

You are welcome.

Simon.
__________________
Find Appliance Parts at AppliancePartsPros.com - Largest inventory in the U.S. with 91% of all in-stock orders delivered within 2 business days. Thousands of photos and diagrams make it very easy to find the right part. Enter your appliance model here.
Reply With Quote
See inside of your appliance - diagrams and part photos for virtually every model.

powered by AppliancePartsPros.com
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
GE 2 speed washer won't spin in high speed buzzybucks Washer Repair 1 12-16-2011 05:53 PM
Furnace Issues ssyba Heating, Ventilation, and Air Conditioning (HVAC) 7 05-14-2010 11:27 AM
need speed switch - they don't list my model washer - will another speed switch work? Chris F. Washer Repair 5 01-18-2010 08:28 AM
Amana Gas Furnace Ouiserm Heating, Ventilation, and Air Conditioning (HVAC) 2 11-29-2009 09:51 AM
furnace roel Heating, Ventilation, and Air Conditioning (HVAC) 1 10-05-2009 08:28 PM



All times are GMT -7. The time now is 02:28 AM.

The content on this web site is for informational purposes only and is not intended to replace an on-site diagnosis from a qualified appliance service technician. By reading any content on this site you agree to AppliancePartsPros.com , Inc. disclaimer and Terms of Use.
Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17