Honeywell Heat Pump Thermostat Troubleshooting. Hello Richard! We have a Honeywell VisionPro (8000) thermostat with a Carrier heat pump that has two-stages for heating and cooling. We are having problems with staging of the system especially in heating mode. I know the problem also occurs in the cooling mode but it seems worse in the heating mode. The house seems to get uncomfortable even though the system is running and then finally after the thermostat gets to a certain point the second stage will turn on and we feel the difference. It doesn’t matter where we set the thermostat to for temperature. A friend of mine suggested I had a problem with a limit switch.
We also notice sometimes the outside temperature reading on the thermostat is incorrect sometimes and rarely matches the reported temperature from our News sources where we live. Just wondering what your thoughts are and if you can guide us in the right direction. We found your site by doing a search for Honeywell thermostat problems. Anyhow, can you help us please? Thanks in advance!!! (more…)
Two-Stage Furnace Air Conditioner Thermostat Control Problem | Hi I was wondering if you can help me with a two thermostat… because I don’t think my condenser is using the second stage…. I open the thermostat and see that they jumpers,, but is there away you can illustrate my brain and the correct set up I have an Amana 16 seer 2 stage 5 ton units and no one seem to understand this unit,
I went in to the attic. found my models my Condenser ASXC160601BC serial #1307225441 Is a two stage scroll compressor cooling. my furnace is model AMVC950905CXBA serial #1307131781 two-stage gas furnace burner variable speed blowers… this is how is wired at this moment: (more…)
Thermostat Terminal Designations Explanations - You are wiring a new thermostat or about to wire a new thermostat and you want to understand what the terminal designations are on your old and your new thermostat. Why is it such a mystery with these terminal designations? Once you get into seeing how this works it all becomes common sense. This is as long as whoever wired the thermostat originally followed the common sense code of designations. A good example of this is I have opened thermostats and seen black used on the R terminal. Green used on the W terminal and red used on the Y terminal. Once you see the thermostat wire and the colors of thermostat wire that are available you will understand. As far as those unconventional wired thermostats I’ve seen, I can only think that the person was color blind. And that is giving them the benefit of the doubt. Now, on to the designations. (more…)
4 Wire or 5 Wire Thermostat Wiring Problem - Question: We have a 19-year-old condo with an old Carrier mercury thermostat. We have both a natural gas furnace and an AC unit. There are only four wires going into the existing thermostat - red, green, blue, white. On the back of the thermostat are a number of labeled contacts, only the following have wires connecting them:
W - white wire
Y - blue wire
R - red wire
G - green wire
Y is also jumpered to a contact labeled 1 (more…)
How Can I Tell 1 or 2 Transformers for Heating Cooling System? I get this question a lot and I also see this question used in my stats on how people find the site but I do not believe I have directly addressed or dedicated an article to this subject yet but there are residential HVAC systems out there that use 2 transformers and it befuddles some people.
Programmable Thermostat Wiring Diagrams - Installing a programmable thermostat is not unlike installing any other thermostat for your HVAC system. The key is to get the right thermostat for your HVAC system. And to make sure it is wired properly. (more…)
Heat Pump Thermostat Wiring Chart Diagram - HVAC - The following graphics are meant as a guide only. Always follow manufacturers instructions for both the thermostat and the HVAC system. Additional articles on this site concerning thermostats and wiring can help you solve your problem or correctly wire a new thermostat. (more…)
Thermostat Wiring Diagrams – Heat pumps are wired for HVAC control far differently than air conditioning systems so make sure you know the difference and correctly identify the type of HVAC system you have installed. (more…)
Basic Thermostat Wiring Colors - Air Conditioner Systems - Always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Nearly everyone has a camera on their cell phone. (more…)
What you will learn from How to Wire an Air Conditioner for Control - 5 Wires
- this article includes a comprehensive list showing thermostat wire terminations for an air conditioner and a source of heat that includes five wires.
- a detailed description of where each wire goes in the air handler and condenser and what it controls.
- a detailed diagram illustrating where the wires go for 5 wire air conditioner and heating system control.
- resource and related links to help you with wiring and installing a thermostat.
Thermostat wire available here