My balboa tub wont heat more than 75 degrees I keep changing it to ST mode but it wont increase to the set temp which is 103.

SOURCE: Ruud heat pump outside unit trips circuit breaker

Check your wiring between the contactor and compressor for a short to ground, or check the compressor windings for short to ground.
With the Tstat off, the contactor should be open so the only way for the compressor to be trying to do anything is if the 110 volts from the unbroken side are traveling through the compressor to ground. Since 110v is not enough to run it, the overload is kicking it out, cooling off, and repeating the cycle. When you kick on the Tstat, the contactor is supplying voltage directly to ground without going through the resistence of the compressor windings and kicking the breaker.
Post back and let me know what you find.

SOURCE: How to Get Hot tub off sleep mode

press temp button and then the light button in sequence.

hot tub plus

• 77 Answers
• Posted on Apr 01, 2010

SOURCE: When I change the temp. setting it keeps heating at original temp

The keypad appears to working correctly.

When you alter the set temperature via the keypad the display will flash the temperature thats to be acheived, once it stops flashing the keypad will revert back to the current temperature of the water.

Hope that helps,
Ian.
http://hottub.synthasite.com

SOURCE: Fan works, but Oven stays at 100 degrees. Tried

On my C301 U, I found the brown connector on the right side of the oven control board P3-2 loose. It looked connected but while doing a shake test- Whoop, there it is. It is the sensor for the temp probe. If it's loose all the fans run all the time.
http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=C301U&productCategoryId=0124100&brandId=1085&brandDescription=THERMADOR&modelName=BUILT-IN-OVENS&diagramPageId=00014&componentDescription=WIRING%20DIAGRAM&documentId=U2500861&blt=06

SOURCE: inquiring for circuit board shematic

i hope its a schematic to a chip (TEXAS INSTR).. if it is here you go !

http://www.datasheetarchive.com/ST103%2F6-datasheet.html