American Standard Freedom 90 Operation Question - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 01-31-2010, 04:19 PM   #1
Join Date: Jan 2010
Location: Texas
Posts: 1
Rewards Points: 10

American Standard Freedom 90 Operation Question

I have an American Standard Freedom 90 gas furnace. On heating days it seems to run almost continuously. After the initial morning warmup, the unit will come on and run for 5-10 minutes, be off for 5-10 minutes, etc. etc. I notice on the thermostat (American Standard ACONT800) that the temperature never varies from the setpoint (70 degrees). That is, there does not seem to be any bandwidth...the furnace holds the house temperature at 70 and does not let it fall a degree or two and then warm it up again to the setpoint temperature. Also, I know that this furnace has a 4-speed blower, but the furnace always seems to operate in the two high speeds and never in the lower speeds.

Does anyone here know if this sounds like proper operation for this system? Thanks!


goodtexan is offline   Reply With Quote
Old 01-31-2010, 05:01 PM   #2
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,420
Rewards Points: 7,830

That stat is not suppose to let the temp drop more then .5F from set point. And since it rounds out the display temp. You shouldn't see it drop or increase on the display.

The CPH might be set too high. And a lower setting would get you longer on and or off times.
If your furnace is a 2 stage. and they are using that stat. they have used not the wrong stat. But not the one they should have. Should have been a ATON802 or 803. Then the stat would control if it runs in stage 1 or 2.

The blower speed should be set for proper temp rise. And it will only be 1 of 2 speeds for heatng. While cooling can be a different speed yet.


beenthere is offline   Reply With Quote

Thread Tools
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

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
American Standard Freedom 90 Question bobjbc HVAC 22 01-04-2016 04:51 PM
3 - flash code, american standard freedom 90 furnace dfferg HVAC 25 03-04-2012 11:21 PM
American Standard or Carrier? lilvree HVAC 1 02-09-2006 07:57 AM
American Standard or Trane lilvree HVAC 1 02-06-2006 11:22 PM
American Standard vs. any other brand can'tdecide Plumbing 2 10-05-2004 06:54 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1