Question about Heating & Cooling

1 Answer

I BOUGHT TWO DIFFERENT PROGRAMMABLE THERMOSTATS TO INSTALL IN MY HEAT PUMP SYSTEM, I FOLLOWED THE DIRECTIONS TO A T BUT WHEN I SET IT TO COOL THE UNIT REVERSES AND PRODUCES HEAT WITH BOTH THERMOSTATS. MY EXISTING THERMOSTAT HAS TWO MERCURY BULBS AND WORKS FINE, i HAD TO PUT THE OLD ONE BACK IN. WHAT CAN THE PROBLEM BE?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Expert
  • 95 Answers

Heat pumps normally have what is called a jumper wire between you R and RC, RC run cooling. You may not have the jumper installed correctly. Instead of RC you may be using RH run heat

Posted on Aug 10, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I just purchased a house with brand new furnace wired to a RTH2300 Honeywell thermostat. It only has two wires running to it. I can't seem to get it to work in "manual mode"-where I set it on...


?? Connect Wires 5.

Labels don't match?

If a wire does not match any terminal on the thermostat,

see next page.

Quick Installation Guide

6

Alternate Wiring

If a labeled wire does not match any terminal

designation, see diagram below.

Do not use C, C1 or X wire. Do not use B wire if you already

have O wire. Wrap bare end of wire with electrical tape.

This thermostat cannot be used if your old thermostat had

any two of the following wires: R, RC, RH, 4 and V.

Place a jumper (piece of wire) between Y and W if you have

a heat pump without auxiliary/back-up heat.

?? Connect Wires (cont'd)

Programmable Thermostat RTH2300

7

Set jumper JP1, on the back of the thermostat, if you

have connected a wire to the G terminal.

Incorrect jumper setting: An incorrect setting is

noticeable in a gas or oil heating system. When heating

starts, you will initially feel cold air coming out of the vents

as the fan is running before the furnace has enough time

to heat up the air.

?? Set Heating Fan Control 6.

HG Leave the jumper in this factory-set

position if you have a gas or oil furnace.

HE Place the jumper to this position if you

have an electric furnace.

JP1

Quick Installation Guide

8

Set jumper JP2, on the back of the thermostat, if you

have a heat pump.

Incorrect jumper setting: The heat pump operation

will be reversed, i.e., it will cool in Heat mode and will

heat in Cool mode.

?? Set Heat Pump Reversing Valve 7.

O Leave the jumper in this factory-set

position if you have connected O wire to

the O/B terminal.

B Place the jumper to this position if you

have connected B wire to the O/B terminal.

JP2

Programmable Thermostat RTH2300

9

1) Install 2 AAA

batteries on the

back of the

thermostat.

2) Align the two

brackets on the

top of the

thermostat with

the corresponding

slots on the top of

the wallplate.

3) Push the

thermostat

against the

wallplate.

4) Tighten the screw

at the bottom of

the thermostat.

5) Turn power back

on at the heating/

cooling system.

Nov 27, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

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


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

Apr 24, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

New thermostat not cooling. Blowing heat instead.


Hello You have only 5 wires? multi stage if so ,is run by something else.Check that RH/RC is jumped out on new stat.Also check that O is not on the B terminal.If there is an A/B select switch set it to O.Emergency heat button dont matter as there is no wire to run it with only 5 wires.

Apr 17, 2010 | Honeywell Programmable Thermostat Heater

1 Answer

Six wire hook up and new thermostat has only 5


Some thermostats have an extra terminal for an outdoor sensor which tries to anticipate the need for heating or cooling. If this option is not present, you will have an unused terminal which may have a shorting link to a neighboring terminal. Your installation instructions should mention this if the option is or is not included with your model. Also, heat pump systems vary in the system control voltage and not all thermostats and systems are compatible with the more common split system thermostat.

Oct 01, 2009 | Honeywell Electronic Programmable...

1 Answer

Bought 44155c hunter thermostat air won't turn on.


If unit worked before you tryed changing t-stat then its possible the t-stat wires are shorting each other out.take t-stat back off cut back wires a good 6 to 10 inches or if you dont have that much wire to play with just cut back as far as you can and make sure there is no bare wire touching each other ,then just to test unit to make sure its working ok twist yell.,red,green together this should bring both units on and should blow cold.if this works up to this point on the new stat read directions closely there might be a jumper wire in the stat that needs connected usually from y1 to w1 you would install a jumper wire .see if this helps if not write back i have 1 other solution.i hope this helps

Sep 14, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell YTH9421C1002, heat pump puts out cool air in heat mode


You have the stat programmed incorrectly or wired incorrectly there are alot of settings for installers in that stat and all of them have to be set correctly

Apr 05, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

Wc wiring on thermostat


sounds like you have a heat pump the w2 on old thermostat is for a second stage heat. If you can give me a little more information on type of system you have (forced air furnace with heat/cool, Heat pump or boiler)? How many wires are on old thermostat? Is it a no programmable or programmable? How old is the furnace?

Jan 17, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

No heating


We had the same problem and then had to pay $60 to have the guys who installed our original system tell us we just had the settings wrong. We thought we had "electric heat/cool", which is what we set the thermostat for. Turns out we have "auxhilary heat pump" or something like that. We don't have gas heat, it's electric, but apparently its not basic "electric heat/cool". So try changing your settings. Good luck!

Oct 28, 2008 | Honeywell Programmable Thermostat Heater

1 Answer

Honeywell st7000


what type of system do you have? cool/gas heat, heat pump, electric cool & heat. split system or package unit?

Mar 14, 2008 | Honeywell Programmable Thermostat Heater

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

80 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2430 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...