I'd have to check my manual, but don't you hold down the yess button for 
3 seconds or such.  Let me see if I can find it.

I remembered wrong it is hold down the "no" button for ten seconds. 
From the text manual on the cd.

If you hear, "Operating hours indicate it is time to call for service", 
your heating & cooling system has run a period time to require 
maintenance service. The default run time is 6 months but can be 
adjusted by your service company.  For the sighted user, "C F S" appears 
at the temperature setting location on the display screen.  "C F S" 
stands for, Call For Service.  To discontinue the call for service 
message and remove the C F S display press and hold the NO button down 
for 10 seconds.


73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Fri, 25 Oct 2013, Tom Brennan wrote:

> I've one of those talking thermostats from Talking Thermostats.com and it does
> do what they say it will do.  However, be aware that it is not completely
> accessible and after a year or so it starts giving you a message about checking
> your system that just doesn't go away.  You have to get a sighted person to make
> a change on the thermostat in part of the menu system that has no speech.  In
> fact, if it doesn't talk the menu choices are not even covered in the accessible
> instructions.  You actually have to look at the print instructions.  At least
> the instructions that I have are on a large fold-out page so don't do well on
> the scanner.
>
> Tom
>
>
> Tom Brennan  KD5VIJ, CCC-A/SLP
> web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html
>
>