Mira Sport max 10.8 KW running cold

[Ben ten ten]

The shower was working fine, but the flow valve assembly was leaking. I replaced the flow valve assembly, and the leak of fixed, and the shower comes on, but only runs cold, and when you press the high button, the high button light goes off instead of staying on like usual. Any ideas what could of went wrong? What I could test and try to fix it? Any help would be great. Thank you.

 

[swishy6]

I've repaired a few but can't remember exactly what the symptoms were. Is the thermal switch okay?

https://www.showerspares.com/mira_s...port_max/mira_thermal_switch_assembly_416.41/

 

[Ben ten ten]

I'll have to check it. What resistance should I get. The shower itself was working fine. It was just the the flow switch assembly that was leaking. I had to take the whole thing apart and disconnect the wires to replace the flow valve assembly. Is it possible I have some how damaged the thermal switch in the process?

 

[Ben ten ten]

I Used a hair dryer on the electric shower after, just in case there was any small drops of water on the PCB, or electrical connections. Could this of tripped or damaged the thermal cut out switch? Thank you.

 

[swishy6]

Who knows? With power off obviously, it should read as a closed circuit continuity with a multimeter. If not it's knackered.

 

[swishy6]

May have to disconnect one side of the thermal switch to be sure of a correct reading. I can't remember for sure, it's been a while since I changed one.

 

[Ben ten ten]

I've managed to fix it. It was not the thermal cut out. What I found was the shower would run for a few seconds and the low flow light would come on, on the high and medium setting. The flow valve assembly has a contact it makes on to the circuit board' and it was not connecting with enough pressure. I managed to move the circuit board a bit and retighten the screw that attaches it to the flow valve assembly and eventually got it to work. Was very fiddly, because whenever I put back on the shower cover it would move the circuit board again' and I would have the same problem.