Recent content by iamsam

Hi, thanks for tips. Decided it'd be best if I had a read about the wiring (surprised I never thought to do that before...!). So, I guess what you're suggesting is to link orange to programmer HW ON output. Thus forcing orange (what the system thinks is coming from cyl stat ON) always high if...

Thanks, will take a closer look at the wiring and try shorting common and terminal 1 (probably tomorrow). Will update with progress - no doubt as a pretext for more help... :)

If I understand correctly, these are linked. The neutral from cylinder stat (if that's what you mean by common), is already linked to boiler and MV orange.

Ok, so what am I expecting? Nothing seems to change. The cable from the stat has three wires (L/N/E colouring). * Measuring L wrt N reads 0V, this doesn't change from boiler ignited to temp satisfied. * Measuring L wrt E reads 240V, again doesn't change. From what I can gather, the...

Could probably borrow a multimeter from work. Am I looking at an impedance measurement?

OK, how do I go about doing that? Could it be that far out of whack? The cylinder is barely getting warm.

Thanks for the suggestion, but unfortunately it didn't help (except that maybe the boiler stays on for a minute or so longer before claiming there is no longer a demand for heat).

I took the PCB out and had a look at it. Couldn't spot any cracked solder joints (but didn't have a magnifying glass to hand...).

I have a Potterton Suprima 60L boiler. When the HW (only) comes on, the gas ignites. After about a minute, the red LED comes on with green LED flashing (to indicate there is no longer a demand for heat) and gas is extinguished. Shortly after that the red LED goes out with green still flashing...