Question about Honeywell Electronic Programmable Heat/Cool Thermostat - CT3300A100 Heater
I am trying to set up clocl time and schedule however dispaly flash set clock all the time once i try to press button to set up date or run schedule it won't let me
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Posted on Jan 02, 2017
I had exact same problem with RTH7500. Did not set the date properly at the beginning and than realized that there is no menu option to change the date after it is saved once (???!). I was very confused for few hours and wandering - trying to find changing option on thermostat menu; than I was looking online what can be done... I could not find solution...
Than I took out both AA batteries, open the thermostat (be very careful while doing this - you don't want to break plastic peaces that hold the thing together) and took out the button battery thinking that this will reset the thermostat... but it did not.
I repeated the same thing, but this time, while the button battery was out, I put two AA batteries back and this reset the thermostat... the old - blinking date appeared and I was very happy to see this on thermostat screen! This time I set the time properly and it works fine.
Hope this will be helpful if you did not solve the issue yet... if you did, someone else might find this solution useful.
Posted on Aug 03, 2009
SOURCE: I HAVE A HONEYWELL T8600D
pknab, I have the same problem. And it comes down a few things: 1) the flashing 1:00 indicates that you've lost power, and the system needs to be reset. 2) Reset means taking out the batteries for longer than 5 minutes. 3) You have to change your filter monthly. There's one in the cold air return and another one in the furnace. If you don't, your FURNACE may be causing number one (my conjecture). 4) We had an electrical storm 2 days ago--nothing else in the house lost its sense of time...but...well...the online operating manual is difficult to find try http://customer.honeywell.com/techlit/pdf/69-0000s/69-1400.pdf or http://dl.owneriq.net/e/e67c2c91-73c2-4bd8-abc8-91d843a27658.pdf (but it doesn't tell us this stuff...I'm still looking for the meaning of the EEE in the display..perhaps I have repowered the thermostat/furnace in the wrong order).
Posted on Dec 16, 2010
The problem with the honeywell brand is that the only dependable units begin with TH not RTH the RTH is for residential and you can purchase those at a local home improvement store. Go on Ebay and spend the money for a quality t-stat. "you get what you pay for"
Posted on Apr 29, 2011
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