ASI's Learn About a Thermostat Call for Cooling
HVAC Sales, Services, Repairs, Installations and Consumer Information
Consumer Information
Residential Thermostats
T-Stat for Heat Pumps
T-Stat Multi-Stage
T-Stat Call for Heat
T-Stat Call for Cool
Residential Zone Controls
The Thermostat Wars
HVAC Info Articles
HVAC Tips Articles
HVAC Help Articles
HVAC FAQ Articles
HVAC News Articles
Duct Work
Duct Work & Grille Sizing
Ductwork Leaks & Testing
Duct Work Maintenance Tips
Duct Work Troubleshooting
Gas Heat & Furnaces
Cracked Heat Exchangers
Furnace Failure #1 Cause
Furnace Flue for the Birds
Furnace Maintenance Tips
Gas Furnace Burner Ignition
Gas Furnace Flame Sensor
Gas Furnace HSI Ignitor
Gas Furnace Inducer Fans
Gas Furnace Safety Devices
Gas Furnace Spark Ignition
Gas Furnace Standing Pilot
Gas Furnace Troubleshooting
Heating Troubleshooting
Heating Repair or Replace
Heating Op Cost Comparison
Heating Consumer Alerts
Two Stage Gas Heat
Dual Fuel Systems
Dual Fuel Troubleshooting
Dual Fuel Controls
Electric Heat & Furnaces
Electric Furnace Troubleshoot
Electric Heating Troubleshoot
Heat Pumps
Heat Pump Troubleshooting
Geo Thermal Heat Pumps
Also see Air Conditioning above
Oil Furnaces
Oil Furnace Troubleshooting
Also see Gas Heat above
Radiant Heating Systems
Boiler Troubleshooting
Air Conditioning
A/C Maintenance Tips
A/C & Male Dogs Bad Mix
A/C Preventing Failures
A/C Repair or Replace
A/C Troubleshooting
Cooling Consumer Alerts
Cooling Cost Comparison
R22 and R410A
Refrigerant Cycle
HVAC Other General
Air Distribution Types
Air Filtration Types
Air Sterilization or UV Lamps
Gas Piping DIY Dangers
Heat Recovery
Humidity and your comfort
Indoor Air Quality
Efficiency Ratings SEER EER
Evaporative Coolers
HVAC Equipment Grounding
HVAC Contractor Scam Alerts
HVAC Helps Prevent Illnesses
Variable Speed Systems
HVAC Green Tips
Green Energy Saving Tips
Investments in Energy Saving
No Cost Energy Savings
Low Cost Energy Savings
More Homeowner Resources
ASI's HVAC Products
A/C & Male Dogs Bad Mix
A/C Preventing Failures
A/C Repair or Replace
A/C Troubleshooting
Cooling Consumer Alerts
Cooling Cost Comparison
R22 and R410A
Refrigerant Cycle
HVAC Other General
Air Distribution Types
Air Filtration Types
Air Sterilization or UV Lamps
Gas Piping DIY Dangers
Heat Recovery
Humidity and your comfort
Indoor Air Quality
Efficiency Ratings SEER EER
Evaporative Coolers
HVAC Equipment Grounding
HVAC Contractor Scam Alerts
HVAC Helps Prevent Illnesses
Variable Speed Systems
HVAC Green Tips
Green Energy Saving Tips
Investments in Energy Saving
No Cost Energy Savings
Low Cost Energy Savings
More Homeowner Resources
ASI's HVAC Products
Air Conditioning Units
Gas Furnaces
Oil Furnaces
Electric Furnaces
Heat Pumps
Geo Thermal Heat Pumps
Thermostats
Water Heaters
ASI's HVAC Services
Air Conditioner Repairs
Furnace Repairs
Heat Pump Repairs
Maintenance Services
Service Request Links
Request a Service Call
Request a Free Estimate
Request Maintenance Services
|
|
Residential Thermostat Call or Switching for Cooling
The first thing that must happen is that the control thermostat must provide a voltage signal both to the furnace and air conditioning unit at the same time. The thermostat can be most understood as simply a switch that turns a low voltage 24 volt power on and off to the respective terminals.and
In the case of the thermostat calling for cooling the thermostat switches on the power from the “R” or in some cases the “RC” terminal which is the 24 volt power source to the “Y” terminal on the thermostat which is in essence the call for cooling. These terminals are located on the back or on the wall mounted face plate of the thermostat.All the wires connected to the thermostat will usually always go directly to the furnace and another set of wires will then go out to the outdoor air conditioning unit and if wired correctly the specific terminals that the wires are connected to will match at both the thermostat and at the furnace. For instance the wire connected to the “Y” terminal should be the same wire at both the thermostat and the furnace heating system.
The second set of wires going to the outdoor unit also connect to the "Y" and "C" terminals in the furnace and then they either connect to another terminal or simply to wires inside the outdoor unit. The same 24 volt power applied to the Y terminal at the furnace also tells the air conditioner to runOne important thing to note is that all electrical circuits must have both a positive and negative side to complete the circuit, much like a battery has both a plus ” + “ and a minus ” – “ side. Without both the positive and negative sides this electrical circuit will not be complete and will not function.
Most digital thermostats, thermostats with an LCD display of some type, will have both the positive and negative. Some other types are either battery powered or are not digital but are simply some sort of a mechanical switch and do not have the negative circuit at the thermostat. Regardless the negative side of the circuit at the thermostat is normally used only to power the thermostat itself.
For the purpose of understanding where the positive and negative are located on the thermostat and on the furnace in most if not all cases the positive side is always on the “R” “RH” or “RC” terminal and the negative side is almost always on the “C” terminal. The “RH” is usually designated as the heating power source and the “RC” is usually designated as the cooling power source and in most cases these are connected together.
CAUTION - Always be very careful with electricity as it can be lethal, if you are not comfortable performing any of these steps please do not perform them, of course you are performing these steps at your own risk.
Important Note: The heating system control board is sometimes very sensitive to static electricity, avoid touching this board to prevent failure.
ASI's Cooling Related Articles
  What
should I Look for Before I call for services on my air conditioning
system? The number one issue we find on air conditioning systems is
clogged filters. First look to see if your air filter is clean and not
clogged up, if it is clogged change the air filter and try your system
again but keep in mind with the air conditioning system running with a
clogged air filter you could have also iced up your indoor coil due to
low air flow.
|
  Why
does my Air Conditioning run all day in hot weather? Assuming this is
not a new symptom... this is a common complaint and can be attributed to
two possible things. The first is that your system may have been
designed correctly to meet the latest energy codes to perform at the
highest efficiency. The other possibility is that it was not designed at
all or was not sized properly in the first place. |
  Things you can do to maintain your air conditioning system. You can keep the outdoor air conditioner clean. You can
vacuum out the inside of the unit and get all those leaves and stuff
out. On most units you can gain access through the service panel. Be
sure the power is off before opening the panel. Be careful not to knock
off any wires and do not hit the coil as you will cause permanent
damage.
|
  In
the case of the thermostat calling for cooling the thermostat switches
on the power from the “R” or in some cases the “RC” terminal which is
the 24 volt power source to the “Y” terminal on the thermostat which is
in essence the call for cooling. These terminals are located on the back
or on the wall mounted face plate of the thermostat. All the wires
connected to the thermostat will usually always go directly to the
furnace and another set of wires will then go out to the outdoor air... |
ASI's HVAC and Home Improvement Articles HVAC Contractor Air Conditioning Refrigerant Rip Off One of the more common things we see are air conditioning systems that have been overcharged with refrigerant. This common rip off is usually done when you call for a simple maintenance service and they... HVAC Heating Air Conditioning Capacitor Rip Off Another common practice by dishonest contractors is to replace a simple small part that many times is not necessary. The capacitor is one of those parts that is relatively inexpensive... The Geo-Thermal System Explained in a Nut Shell Geothermal is by far the highest efficiency heating and cooling system available today. While the systems require up to three times more investment upfront than a conventional heating and cooling system... Ameri-Serv, Inc. Heating and Cooling News Ameri-Serv Inc Helping the Treasure Valley Community Ameri-Serv, Inc. Heating and Cooling has successfully helped dozens of Treasure Valley Families with thousands of dollars worth of free maintenance services and repairs through this holiday... |
|
ASI's Best Selling Thermostat
Recommended for York systems, this is the only thermostat that integrates with home automation systems and comes with great features built in.All Venstar Thermostats come with the following standard features:
*3 configurable outputs for maximum flexibility (except T1700)
*Heat pump compatible
*Backlit, color-coded keys and legends
*Large, easy to read backlit display
*Configurable programmable or non-programmable *Configurable manual or auto changeover and much more
T1900 Series
*All of the Venstar T1800 Thermostats feature the following;
*Programmable output
*Built in humidity module
*Can average with 1 remote sensor
*Dual fuel capable
*Reheat capable
*Dry contact equipped
*Drain pan alert ready
*Energy watch
*Energy-Star rated
T1800 Series
*All of the Venstar T1700 features
*7-day programmable
*3-Heat/2-Cool
*Controls to, or monitors a 2nd sensor
*3-configurable outputs
*Hi/Low outdoor temps of the day
*Programmable fan
*Accepts humidity module
*Energy Save
*Energy-Star rated
T1700 Series
All of the Venstar standard features
1-Day Programmable with up to 4 time periods
Auto changeover 2-stage heat, 1-stage cool for use with gas/electric, heat pump, electric & hydronic heat
Breaking News: The Cost to Repair your old Air Conditioner just Skyrocketed
____________________________________________________
Amana - American Standard - Armstrong - Armstrong Air - Bard - Bryant - Carrier - Coleman - Comfort Aire - Comfortmaker - ICP - Goodman - Heil - Lennox Luxaire - Magic Aire - Maytag - Mr. Slim - Payne - Reznor - Rheem - Ruud - TempAir - Tempstar - Temptrol - Thermo Pride - Trane - Water Furnace - Weather-Rite - Westinghouse - Williams - York
Serving all of the Treasure Valley
SALES, SERVICE, REPAIR AND INSTALLATION OF HEATING AND AIR CONDITIONING
BOISE - MERIDIAN - NAMPA - CALDWELL - EAGLE - GARDEN CITY - STAR - KUNA - MIDDLETON
Boise - Meridian: (208) 342-4328 Nampa - Caldwell: (208) 467-2665
ASI is Locally Woman Owned and Operated ~ Fully Licensed, Bonded & Insured ~ Idaho HVAC License C10036
13601 W McMillan Rd Suite 102-120 Boise, Idaho 83713 Office (208) 342-4328 Fax (208) 906-1282
Privacy Terms
Copyright 2011. ASI Heating and Cooling a Division of Ameri-Serv, Inc. All rights reserved
13601 W McMillan Rd Suite 102-120 Boise, Idaho 83713 Office (208) 342-4328 Fax (208) 906-1282
Privacy Terms
Copyright 2011. ASI Heating and Cooling a Division of Ameri-Serv, Inc. All rights reserved