Question about Honeywell Programmable Thermostat Heater

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I install new RTH7500D thermostat Honeywell, when I set for Cool it blowes heat when I set for a Heat nothing works I wire per instruction have two stage system

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Hi,
It sounds like the t-stat is programmed for a heat pump or you have a heat pump and the t-stat is programmed for a regular furnace....
Check out the manuals in the tip and go into the installer setup to change the t-stat to the proper programming for your system..

http://www.fixya.com/support/r3902153-honeywell_rth7500d_thermostat

heatman101

Posted on Apr 25, 2010

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Posted on Jan 02, 2017

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Honeywell thermostat blows cold air on heat


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Tip

Honeywell RTH7500D Thermostat


This Honeywell thermostat is a good medium priced thermostat that will give you many bells and whistles at a very good price. The programming is very easy to do and of course the thermostat is very reliable also.

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The installation of this thermostat is very easy and if you need help with the installation you can go here to see the complete installation guide.

http://customer.honeywell.com/techlit/pdf/PackedLit/69-2221ES.pdf

If you have lost your owners manual and need a copy of it you can go here

http://customer.honeywell.com/techlit/pdf/PackedLit/69-2222ES.pdf

With the help of these .pdf files you can get all the information that you need to install and troubleshoot your RTH7500D thermostat.
If you are replacing a thermostat make sure that you turn off power to your heating or air conditioning system BEFORE you start removing any wires. Failure to do so could cause you to burn out the 24v transformer of your system. Also make sure to mark all wires well before removal so that you know which wire went where and so that you can reinstall the old thermostat as it was if something goes wrong with the new installation.

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http://www.fixya.com/support/r3623083-thermostat_wiring_terminal_designations

http://www.fixya.com/support/r3892721-programmable_honeywell

http://www.fixya.com/support/r3894275-manual_honeywell_find_honeywell_manuals

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