brummydave
Senior Member
A Honeywell R6660D went bang last week. Must've sensed the coming drop in temperature! bad day explode
That's the RF Transmitter for the 927 programmable thermostat. (great bit of kit!) It had blown the central heating fuse (3A) shortly into the morning heating cycle, I could tell because the house was warm but all the controls and boiler were off. When I replaced it it blew almost straight away. Saw a flash from inside the box so disconnected the transmitter and bypassed the circuit. Back to just a programmer and TRVs at present.
Ever heard of anything like it?
The only slightly faulty thing this programmer has done is to lose its binding with the controls whenever there's a power cut. But rebinding has never been a bother apparently.
Anyone got a contact at Honeywell or elsewhere to get a replacement transmitter?
Or is there a likely fault somewhere that'd cause this which needs remedying first?
FYI All connections were tight, no sign of damaged cables or stress anywhere, the only bit of charring is on the prongs of the circuit board that go into the terminal block. And there's no smell of anything cooked.
Also, the motorized valve actuator was replaced not long ago if that's relevant!
TTFN
D.
That's the RF Transmitter for the 927 programmable thermostat. (great bit of kit!) It had blown the central heating fuse (3A) shortly into the morning heating cycle, I could tell because the house was warm but all the controls and boiler were off. When I replaced it it blew almost straight away. Saw a flash from inside the box so disconnected the transmitter and bypassed the circuit. Back to just a programmer and TRVs at present.
Ever heard of anything like it?
The only slightly faulty thing this programmer has done is to lose its binding with the controls whenever there's a power cut. But rebinding has never been a bother apparently.
Anyone got a contact at Honeywell or elsewhere to get a replacement transmitter?
Or is there a likely fault somewhere that'd cause this which needs remedying first?
FYI All connections were tight, no sign of damaged cables or stress anywhere, the only bit of charring is on the prongs of the circuit board that go into the terminal block. And there's no smell of anything cooked.
Also, the motorized valve actuator was replaced not long ago if that's relevant!
TTFN
D.
