This question is regarding Dimplex ax3 - Shower Spares

Dimplex AX3 only cold water sometimes

On a couple of occasions, the Dimplex AX3 shower only produced cold water despite being on the hot setting (and no LEDs lit up). When turned to the warm setting and then to the cold setting, and then back to hot, the shower then produced hot water, and worked normally. This was an intermittent fault until it now only ever produces only cold water. Is the Thermal Cut Out likely to be the culprit? If not, then what do you suggest?
Asked 8 years ago by Rod
The things to check first are:

1 That the main valve coming into your house is fully open.

2 Then check that the valve on the line to the shower is fully open.

If these valves are not fully open then there may not be enough water getting to your shower to cool it properly the overheat safety device will turn the power off until it cools Then it all starts again



Make sure that the shower head is clean and clear, that the hose isn’t kinked (this can happen just behind the hand set where it is difficult to see) also check the inside of the hose although it can look OK on the outside it could have collapsed internally

The other possibility is a faulty flow/stabilizer valve not allowing the correct amount of water into the shower.

A rough check is to remove the shower head turn temperature control to fully hot the water coming out of the hose should be a bit more than a dribble then turn to fully cold and it should be coming out at full flow.

If there is not much difference between the two then you could have a faulty flow valve.


The tco is working as it is cutting off the power and making the shower go cold.

Answered 8 years ago by Anonymous

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