Programmer and wall 'stat replaced - now no hotwater?

[simbo69]

Wonder if anyone can shed any light on this for me... Replaced a Drayton LP241 programmer with a LP722 (supposedly a straight swap??) and at the same time swapped a Drayton RTS1 room thermostat for a Honeywell DT90E digital Room 'stat. The only wiring alteration for either was to terminate the neutral at the room stat in a connector block as the new stat requires 2-wires rather than 3.

The problem is that since these have been replaced the hot water has stopped working (but the central heating has worked fine). The lights come on so it looks as though it should be working. Could it be a faulty programmer? Alternatively is there anything else I can check?

 

[simond]

Is there any reason why you cant put the 241 back as test?

 

[simbo69]

Hi, yes unfortunately it was thrown away! I am considering buying a new one to re-fit as that was my first thought.

 

[simond]

Just link the L and terminal 3 with a piece of cable, if HW comes back you have a duff programmer.

 

[simond]

Ps do you have anything in terminal 1 or 2?

 

[simbo69]

I think there is but I will have to check tomorrow. I assume there should be cables terminated in them both. Just seems odd (and frustrating) that the LP241 was working ok.

 

[simond]

There should be nothing in term 2

 

[simbo69]

Problem solved - I was sold a dud. The programmer I was sold as a new model said "warranty expired June 2007" on the back. Will pay more attention to the small print in future!