Hot water tap very hot

[Stevie77777]

My hot water is too hot for washing hands. I have water off on my program and its still getting hot maybe when heating is on. I have replaced the cylinder stat and replaced actuator danfoss hpa2. When replacing head the valve on body was moving freely. The pipe from motorised valve to hot water tank is hot to touch. I have recently had my programmer eph t27 hw moved to new location and this maybe when problem seemed to start also. Heat only gas boiler. Any suggestions what to try next would be appreciated thanks

 

[oilhead]

With HW off and CH on, is the hot water valve open?

 

[ETAF]

under your label for the pipe - is that a hotwater tank thermostat?
whats that set to ?

 

[Harry Bloomfield]

Make certain the immersion heater is turned off.

 

[Stevie77777]

With HW off and CH on, is the hot water valve open?

How do I check if valve open?

under your label for the pipe - is that a hotwater tank thermostat?
whats that set to ?

Yes hot water tank stat, tried 60,50 and then lowest but didn't change anything.

Make certain the immersion heater is turned off.

Yes immersion is off

 

[Harry Bloomfield]

How do I check if valve open?

By starting with the system cold, then feeling the pipes. If the valve is closed, there will be no heated water flow, so the pipe will remain cold.

 

[CBW]

Sounds like you’ve got let by on the hot water zone valve

 

[Stevie77777]

By starting with the system cold, then feeling the pipes. If the valve is closed, there will be no heated water flow, so the pipe will remain cold.

Turned on CH, pipe from HW motorised valve is slight warm can wrap hand around it and hold on, very hot pipe leading to HW valve and can only touch that.

Sounds like you’ve got let by on the hot water zone valve

Is this an easy fix and we're do I start?

 

[CBW]

This would need the whole valve changing, as opposed to the head.

 

[Stevie77777]

This would need the whole valve changing, as opposed to the head.

Does the whole system need drained down to replace?

 

[terryplumb]

Does the whole system need drained down to replace?

Yes ,draining to a level lower than the valve at least

 

[Stevie77777]

I currently have Sunvic eml 3454 body, should I replace with same or Danfoss hpv22 valve body to match Danfoss actuator?
See picture looking to see what pipe under motorised valve is for?
CH valve was recently replaced under insurance and have just realised its not secured on body with screws but with cable tie, surely this should not of been done? Thanks

 

[terryplumb]

The valve body and actuator should be the same brand/ model.
No ,cable ties shouldn't be necessary.
" See Pic of pipe ,etc" please clarify ??

 

[Stevie77777]

The valve body and actuator should be the same brand/ model.
No ,cable ties shouldn't be necessary.
" See Pic of pipe ,etc" please clarify ??

Sorry forgot pics

 

[terryplumb]

It's a lockshield valve . It's used to throttle the flow through the coil.