Peter,
When I first bought the Sprint (last summer), I felt it was running too hot. Rightly or wrongly, I’ve always run twin cams in the low 70’s. So I changed the 'stat to a 72 degree version, and then contacted Otter to see if they did a lower rated switch.
I simply rang and asked for Technical support. I was then put through to a really helpful and interested tech guy. I explained my enquiry. He said that I really did not wish to know the cost of a new switch, but that he thought they did a lower-rated version. He was about to go on holiday, but would do what he could. He took my details, name, address etc.
It was only after putting the phone down that I realised he had not asked for any credit card details.
I kept my fingers crossed, and sure enough a little package arrived via the post, a few days later. No invoice, just an Advice Note pointing out that the contents are for my “evaluation purposes”.
According to the Note, the switch operates as follows:
Max 82, Min 72, min diff 4. Still can’t get my head around those figures.
I actually now no longer use the switch, having changed to a full-with rad with Kenlowe fan.
Otter Controls’ number is/was 01298 762300.
Assuming Otter do a variety of temperature ratings, do bear in mind that the Otter switch cut-in temp must be related to your chosen thermostat rating. You might care to check your Otter’s cut-in temp against the dah temp guage, and then compare it with the thermostat setting.
FWIW, my original switch didn’t have the safety bracket (same as you), and there were no signs of leakage. PO had just used cable ties. You may well be ok as you are.
HTH.
Regards,
Stuart.