Dimplex Optimyst- cutting out

[Keith Bowen]

Our our of warranty Optimyst Auberry fire works perfectly normally with the remote (the flame effect) for circa 30mins - and then cuts out with a ‘beep’ noise.

I have replaced:
The fan
The screw top on the water tank
The transducer
The PCB board

Once it cuts out, by switching it off at the mains, and switching it back on the fire then ‘beeps’ again; and can be operated okay by the remote - for another 30 or so minutes!

Pointers to the fault welcomed.

 

[Dan83]

I'm having the same problem. Did you find out the problem?

 

[Keith Bowen]

No, sorry - failed and now completely given up trying to solve the problem.

Dimplex win - Customer loses.

 

[Stiggy sawdust]

Sick of repairing mine so I've finally given up on my Oakhurst. The most unreliable £500 pounds worth ever.
Just ordered a new Non Dimplex and Non optimyst fire.
Certainly can not recommend Dimplex, but it certainly looked great when it did decide to work.

 

[TheCatsDaddy]

I know this is an old thread but I also guess that lots of people, just like me, have visited it hoping to get something of help. I'm back because I figured out something that fixed for me, what I understand to be the problem that others are also having. I too gave up and was going to dump mine. It was bought in 2013. I had lots of obvious problems and the beep and switch off was just one.

So this works for me but my fire (DNV20BR) has other issues that may help my solution to work. Give it a try anyway.
With the fire off:

• Press the RHS side of the Left Hand switch once. (ON)
• Give it a few seconds then press the LHS of the Right Hand switch steadily until it beeps three times.
• Switch the RHS side of that same Right Hand switch once (OFF)
• Press the LHS side of the Left Hand switch once. (OFF)

I have found that doing this can resolve the issue and the next time it is switched on it will work. I spent weeks trying to figure out if my frustrated attempts at starting it were actually doing something useful occasionally, or if it was just random chance. One day it just came to me that this might do the trick. When I had applied this routine after it had failed half a dozen times and they all cured the problem, I figured I'd got an answer for my problem at least.

The fire appeared to get itself out of sequence in what it was doing and this seemed to put it in a known state, resetting it for the next time it was switched on.

I resolved all my other issues by unplugging the fan and transducer and putting a separate mains 24V adapter behind the fire. I ran the power in using a garage door wireless controller key fob. The diffuser must have 24V to work. It has very little tolerance. I run the 24V supply to the fan using a cheap motor speed controller. The fan volts need to be variable to control the amount of mist. I have the control knob just under the front grate. It is brilliant now that the flame effect is isolated from the fire and easily accessible and diagnosable. Good luck.