Hot water tap very hot

[oilhead]

Swap your valve actuators over?

 

[Stevie77777]

Swap your valve actuators over?

If I swap them will I still not have a problem with the HW valve body that needs replaced per previous answers?

 

[Harry Bloomfield]

If I swap them will I still not have a problem with the HW valve body that needs replaced per previous answers?

Could you not just watch the movement of the actuators business end, when the HW is turned on and off? It should rotate back and forth through 90 degrees. You could also turn the actual water valve through 90 degrees with a pair of pliers - starting with it off/right angles to the pipes, whilst feeling the pipe for change in temperature. That would confirm the valve is working.

 

[Stevie77777]

Could you not just watch the movement of the actuators business end, when the HW is turned on and off? It should rotate back and forth through 90 degrees. You could also turn the actual water valve through 90 degrees with a pair of pliers - starting with it off/right angles to the pipes, whilst feeling the pipe for change in temperature. That would confirm the valve is working.

Pipe below HW motorised valve has change in temperature when HW turned on at programmer and shuts off when turned off. Any ideas what needs looked at next why water so hot in hot water tank when not turned on? I also got a new pump installed last month. Cheers

 

[HERTS P&D]

I have recently had my programmer eph t27 hw moved to new location and this maybe when problem seemed to start also.

I think you have a wiring problem!

Call back the guy who moved it and ask him to check the wiring.

Andy

 

[terryplumb]

For the hot water in your cylinder to heat ,then hot water from your boiler has to flow through the cylinder coil ,and back to the boiler. The mechanical part of the valve body would need to be open ,even partially,for that to happen.
With no demand for hot water at the programmer ,and central heating on at programmer ,feel the two pipes that connect to the cylinder coil . If both get to the same temperature ,then hot boiler water is flowing through the coil.

 

[Harry Bloomfield]

Pipe below HW motorised valve has change in temperature when HW turned on at programmer and shuts off when turned off. Any ideas what needs looked at next why water so hot in hot water tank when not turned on? I also got a new pump installed last month. Cheers

If there is no heated water going into the cylinder heating coils when the HW is turned to off, then that is obviously not the source of heat. You need to be looking elsewhere and the only other likely source is the immersion heater. Try turning the MCB/RCBO for the immersion heater off.

 

[danfre]

Cylinder thermostat to low.

 

[Stevie77777]

For the hot water in your cylinder to heat ,then hot water from your boiler has to flow through the cylinder coil ,and back to the boiler. The mechanical part of the valve body would need to be open ,even partially,for that to happen.
With no demand for hot water at the programmer ,and central heating on at programmer ,feel the two pipes that connect to the cylinder coil . If both get to the same temperature ,then hot boiler water is flowing through the coil.

The two pipes that connect to coil are hot same temperature. The pipe from HW motorised valve is only hot in the circle part above the stat.

 

[Stevie77777]

If there is no heated water going into the cylinder heating coils when the HW is turned to off, then that is obviously not the source of heat. You need to be looking elsewhere and the only other likely source is the immersion heater. Try turning the MCB/RCBO for the immersion heater off.

Have turned the immersion off at circuit.

 

[terryplumb]

The two pipes that connect to coil are hot same temperature. The pipe from HW motorised valve is only hot in the circle part above the stat.

Do you mean the pipework ,from the area you circled ,upto the zone valve is not hot ? And the bottom pipe from coil is VERY hot ? All with only central heating running ?

 

[Stevie77777]

Do you mean the pipework ,from the area you circled ,upto the zone valve is not hot ? And the bottom pipe from coil is VERY hot ? All with only central heating running ?

Yes that's correct both circled areas hot and pipework from valve until it bends coming down not hot. Heating off now 1hr30mins and circled area above the stat is still hot all other pipes cold and immersion still off at circuit.

 

[terryplumb]

Have you noticed any discolouration in your domestic hot water ?
If you run programmer on hot water only ,no central heating ,and feel the two pipes ( circled) where they meet the cylinder ,which one heats up the first ??
Is there any signs of your loft tanks overflow warning pipes ( usually up near your roof eaves) dripping water out ?
Is the smaller loft tank ( F&E) on a higher level than the cold water storage cistern ?
It sounds like your coil may be perforated.

 

[Stevie77777]

Have you noticed any discolouration in your domestic hot water ?
If you run programmer on hot water only ,no central heating ,and feel the two pipes ( circled) where they meet the cylinder ,which one heats up the first ??
Is there any signs of your loft tanks overflow warning pipes ( usually up near your roof eaves) dripping water out ?
Is the smaller loft tank ( F&E) on a higher level than the cold water storage cistern ?
It sounds like your coil may be perforated.

No discolouration in hot water
When turned on HW and water started to flow top circled pipe went cool(was still hot before HW turned on) and bottom one warm but top one was first to heat up properly were u could just touch it.
No sign of overflow will double check tomorrow
Yes smaller loft tank higher level than cold storage, thanks

 

[Stevie77777]

Is there any signs of your loft tanks overflow warning pipes ( usually up near your roof eaves) dripping water out ?
/QUOTE]

No sign of overflow from outside do I need to check anything in the tanks in attic?