Question about Heating & Cooling
I had to install a new thermostat, I bought the Honeywell RTH7500, I have a multi stage heat pump. When I activate the thermostat for cool air, the fan will come on but no cool air, I can get the heat to work, but no A/C. Any suggestions?
Assumed all the wiring are correct,
to change from manual switching from heat to cool, press [system] button ( left ) to go into system setting.
then press and hold the [fan] middle button untill option display 120
use up down button to select option 300 ( Manual/Autochangeover) ,
select 0 for manual, 1 for automatic. ( read caution in page 22 of installation manual )
Posted on Oct 14, 2008
You the man!
I had an old Baystat 239 that would never shut off. I bought the Honeywell RTH7500, couldn't get it to cool, found your solution online and moments later I had cool temps! Thanks for the help!
Posted on Jun 07, 2010
The thermostat must be programmed (setup) for operation with your system. Check the manual for the settings for use with a multistage heat pump. If you are running a dual fuel system then be sure you also include this when you do your set up. In addition you must also set up the thermostat so that it will operate in the auto-change over mode.
Posted on Sep 30, 2008
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Posted on Jan 02, 2017
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