first, who manufactured the thermostat that you are having problems with? is there any chance it may still be under warranty?
second, if it is a digital programmable thermostat, high and low temperature settings can be set into it to keep anyone from running the air conditioning down low enough to damage the compressor or the heat too high and damaging the heating system.
third, if you must install the manual thermostat, the jumper should be 18 awg.
as far as color coding of the wire, make a diagram of where the different colored wires are connected on the existing thermostat."NORMALLY" red is power (hot), blue is common, white is 1st stage heat, yellow is first stage cooling, orange is the reversing valve on a heat pump, green is the fan, brown is second stage heat and black would be a spare conductor. some manufacturers of thermostat wire use different colors such as violet to correspond with a specific manufacturer such as Rheem. the color is not as important as what it is connected to!
you can find programming instructions for your thermostat online. this would enable you to see if a high and low limit was programmed into your thermostat at installation.
since it is battery operated, remove the thermostat from its wiring base and place it near a good digital thermometer inside of a box or container. this would allow you to verify if it is reading correctly. leave it alone for at least 30 minutes to make sure they are both reading ambient temperature and not being affected by a draft or external heat source. if it reads the same, check to see if something else nearby was causing the temperature fluctuations that you were experiencing, such as a cooling fan on an appliance or computer etc.
On Wednesday, December 31, 2014 8:28 AM, "Terry THenne1713@aol.com [DoIt_Yourself]" <DoIt_Yourself@yahoogroups.com> wrote:
If you have a modern circuit board system, and a bad connection/ function of airflow switch, unit will cycle gas on/off because the board thinks the fan is not running. It will maybe keep from freezing, but never get up to temp.
Terry
thenne1713@aol.com
thenne1713@aol.com
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Posted by: Mike Shoaf <mike.shoaf@yahoo.com>
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