Returned home yesterday afternoon to find heating hadn't come on. On timed using Honeywell ST699. The pump was running but boiler Ideal Classic NF60 hadn't fired, fan not running. Turned switch on programmer off and on and boiler fired. Worked fine all evening.
This morning when I turned switch on there was a flash in programmer as it blew. Solder gone and black round connection 8.
Unfortunately fuse in switch turned out to be 5A rather 3A. I wonder if that might have stopped it circuit board blowing.
Very tempted to go and buy a ST799 tomorrow. I understand it will clip straight onto subbase for ST699. The battery on old timer went years ago so we lost heating if we went away and there was a power cut. So needed to replace anyway. Worried I may end up blowing new ST799 straight away though.
Looking at previous posts on this forum problem might be with fan or pump:
- Fan appears to be fine. Two years ago I'd had problem where boiler didn't come on and problem turned out to be fan was sticking. Solved by squirt of WD40. Checked fan, it's turning freely this time.
- Pump was working.
Could problem have just been in the old ST699 programmer?
Really appreciate any advice please.
This morning when I turned switch on there was a flash in programmer as it blew. Solder gone and black round connection 8.
Unfortunately fuse in switch turned out to be 5A rather 3A. I wonder if that might have stopped it circuit board blowing.
Very tempted to go and buy a ST799 tomorrow. I understand it will clip straight onto subbase for ST699. The battery on old timer went years ago so we lost heating if we went away and there was a power cut. So needed to replace anyway. Worried I may end up blowing new ST799 straight away though.
Looking at previous posts on this forum problem might be with fan or pump:
- Fan appears to be fine. Two years ago I'd had problem where boiler didn't come on and problem turned out to be fan was sticking. Solved by squirt of WD40. Checked fan, it's turning freely this time.
- Pump was working.
Could problem have just been in the old ST699 programmer?
Really appreciate any advice please.
