R
rolysatch
hi
i've got a honeywell st9400c programmer that's unresponsive and just has the word "internal" on the display. the central heating light is on on the programmer and the central heating works via the roomstat ok, but the hot water doesn't work. i'm not sure if the fault all lies with the programmer and the heating just happened to be on at the time of malfunction and hence its now stuck on and useable or there's a fault with the system itself?
i'm going to get the heating engineer out, but was curious if anyone knows what "internal" on the display means?
thanks in advance
roly
i've got a honeywell st9400c programmer that's unresponsive and just has the word "internal" on the display. the central heating light is on on the programmer and the central heating works via the roomstat ok, but the hot water doesn't work. i'm not sure if the fault all lies with the programmer and the heating just happened to be on at the time of malfunction and hence its now stuck on and useable or there's a fault with the system itself?
i'm going to get the heating engineer out, but was curious if anyone knows what "internal" on the display means?
thanks in advance
roly