Error code 79 on american standard air/heat unit thermostat

SOURCE: I have an error code

I am experiencing the same error code on my American Standard AC and according to Public. #18-HD32D2-8, error code 126 is in the Equipment Change Alert Group and the description says "Equipment does not match value stored at startup." Then, in a footnote, it says "A device has changed since Auto Discovery (See Installer Guide *S& 0706 to reset)."

This is all Greek to me so I'm calling my AC guy. I can tell you this, however. I bought an American Standard AC brand new just two years ago and one year ago exactly, it blew up. American Standard replaced it. Now, one year later, more problems.

I question the quality of American Standard and would not be inclined to buy this brand again.

SOURCE: HEAT PUMP/AIR CONDITIONER UNIT SMELLS ONLY WHEN AIR IS ON

Not sure what the smell...smells like.  My guess is dirt or dust near the heating elements.  These will cause a burning smell.  Sometimes insects even get into the act..building webs.
You will have to clean that area out...sometimes a large blower or vac can dislodge the dust.

SOURCE: American Standard blower will not run

Sounds like motor has failed. If the red light is blinking it may be telling you what is wrong by the number of blinks. It maybe locked out for some reason or loose wire. Try turning off breakers to inside unit for 5 mins and try again, this may reset unit. But it sounds like a bad motor or circut board. Try running with stat in on position instead of auto in cooling mode.

SOURCE: I have error codes flashing

Error codes from American Standard Pub 18-HD32D2-8, which is a one-sheet document that came with my American Standard air-conditioner:

29 = not listed

129 = not listed

80 = HPCO Fault - problem is in outdoor unit - Desscription: High Pressure Monitor Fault (hard lock out, cycle power to reset)

91 = Communication Inactive Fault - problem is in air handler - Descriptions - COMM Bit Master Clock Error, COMM Heat/Cool Demand Error, Serial Motor Communication Inactive Error

91 = Communication Fault - problem is in furnace - Descriptions: Blower motor no COMM response, Inducer motor no COMM response, Loss of heat/cool demand, Loss of clock signal

91 = Communication Fault - problem is in outdoor unit - Descriptions: Loss of Heat/Cool Demand Message (COMM), Loss of Bit Master (Clock Signal)

91 = Communication Fault - Description: Comm line is dead and no bits have been received.

By the way, I do not recommend American Standard. I've had mine 14 months and it just blew up - the entire control panel blew. My advice to you - think about a different brand.

Nancy
Scottsdale, Arizona

SOURCE: My American Standard Heritage 11 unit was not working properly when i came home from work and the temperture in the house according to the thermostat show the temperture in the house to be 85 degree&#

the dual run capacitor is bad located in main panel of unit size of small red bull can it will be swelled up on top indicating it bad get on at electric motor or electric supply house most ac stores wont sell it has a rating like 35/5 370