New home with Honeywell Th6000 that will not allow the cool setting to set below 78 degrees. 85 degress outside temp. The lowest setting allowed on the display during day/night programming is 78 degrees? Also, reset circuit breaker but same problem exist. No flashing display problems or faults sighted.

SOURCE: RV ROOF TOP AIR CONDITIONER TRIPS BREAKER

Possible low voltage condition would cause that kind of a problem. To small a cord without the ability to carry and maintain the voltage would cause a voltage drop. I would test the voltage supply and make sure it is within 10% of that required for your A/C to operate properly.

SOURCE: 579 series, 13.5K BTU Rooftop trips AC circuit breaker in hot weather...

Is your condensing unit located in a well ventilated area and have an ample space, atleast a foot, from the rooftop flooring? Just make a check that free flowing outside air properly ventilates the condensing unit specially on high ambient temperatures. Hope this would solve your problem

BOB BROWER

• 267 Answers
• Posted on Jan 16, 2009

SOURCE: Electric Furnace Trips Breakers

it is normal for a breaker that is run right on the edge (50 amp and your furnance to use 45) to get weak after a while . the first thing you should do is change the breaker with the same type and amp rateing . it should take care if it

SOURCE: I have an existing honeywell

That 's a really good idea. My question would be is that a two wire humidistat? If it is. you would have to parallel the wires. One wire on the "R" on the thermostat and the other would go on "Y" and jumper to "G". Really interesting , I would like to know if it works. I live in Okla. and we have real high humidity summers but probably not like Florida. Hope this helps you.