Layz spa keeps going off says on readout 6cf.heater is fine pump everything else is ok cheers kevin

This is the REAL answer if you see the 6cf error code it's to do with the plug.

I had the error code 6cf and it took hours to work out what was wrong and it was so simple... the pump unit needs to be plugged straight into the mains plug. Wont go away or work of your using an extension cable.

After I plugged it into the mains plug directly error code disappeared fully working.

Hope this helps people and saves them hours of dread thinking they bought a broken unit.

The heating element must be shorted out or the wiring to it is incorrectly installed..

check to see if recirculation pump is working if so check to see if heater element is not shorting out

If you are going to pay someone to replace the bearings, you may aswell pay the money to replace the motor and do a seal change

This could be caused by a couple things. In order for your spa to heat your pump must be working, your heater and heater sensors must be good. If your heater is bad usually the breaker will trip. If that's not happening read below...
Does water shoot out of the jets when you press the jets 1 button? If not then you have a bad pump or the pump is air locked. The heater can't turn on if the pump does not push water through the heater. You'll know if this is happening because you'll get an error code on your control pad.
So your jets are working but no heat. This is the most common problem. Your spa has a sensor that tells the spa if it's ok to turn the heater on. That sensor is prone to failure so everything can be fine but the heater will not turn on. Get the model number off your spa pack and click the link below. Call and tell them you need a pressure switch and give them the model number. Install the new switch and you're back in action.

http://www.spapartsdepot.com/category/pressure_switches/

Checked pump- works, checked heater- works, checked blower- works, flow switch- work, temperature sensors both 56Ohm at 22degrees 6cf is shown when plugged in. If hold buttons and switch the power I can get the blower and water working for split second and 6cf Cuts off relays. I did not found any water detector/preventing the unit working dry ? Does it have one?? Pump, blower, and heater doesn't have any feedback To the pcb it works through relays, I think something else is throwing 6cf.
Anything else I have missed?

The readout may be getting it's temperature from one of those sensors that are hanging in mid-air, not surprisingly low. Both sensors have to be somewhere that they can read some water temp. One of them probably goes into the piping before the heater so it can tell actual water temperature. The other MAY go in piping after the heater in the event of high water temp, it will shut the heater off. Look for a schematic in and around the spa.

What kind of appliance?