I have a Venstar T1800 thermostat with an ISY99.

 

I just started using heat for the first time since installation. Cool has worked correctly according to my program for the last 8 months.

 

I cannot seem to set the thermostats to heat through the ISY99. The webpage display changes when I toggle to heat and/or adjust the setpoint. But when I query the thermostat, the setpoint goes right back to where it began.

 

I just tried to set the thermostat mode to auto and the mode and setpoint seem to "stick".

 

Could there be a wiring or installation error ?

 

Thanks

Hi legalguy,

 

Please upgrade to either of the following firmware:

1. 2.7.6 Beta (http://forum.universal-devices.com/viewtopic.php?t=3007) OR

2. 2.7.7 Alpha (http://forum.universal-devices.com/viewtopic.php?t=930)

 

With kind regards,

Michel

 

I have a Venstar T1800 thermostat with an ISY99.

 

I just started using heat for the first time since installation. Cool has worked correctly according to my program for the last 8 months.

 

I cannot seem to set the thermostats to heat through the ISY99. The webpage display changes when I toggle to heat and/or adjust the setpoint. But when I query the thermostat, the setpoint goes right back to where it began.

 

I just tried to set the thermostat mode to auto and the mode and setpoint seem to "stick".

 

Could there be a wiring or installation error ?

 

Thanks

Can you give me a bit of direction please.

 

I downloaded 2.76 - did not unzip per instructions

Tried to log in with isy - autoupdate - did not work

Logged in with my normal login

Tried to manually upgrade

Got error message: Upgrade Failed:Invalid or incompatible upgrade file

Be sure you are downloading the correct upgrade file. Note that there are 2 files - one for the ISY-26, and another for the ISY-99.

 

Be sure to read the upgrade instructions carefully. In short, be sure you are on a stable network connection (wired if possible) and disable any anti-virus/firewall software you might be running.

I got it now.

 

The new thermostat programming for Auto Mode works great.

 

Thanks!