My outside unit does not turn on itself, but it does work. I just did a quick repair just thinking it was the capacitor and it was only 15 dollars for a new one so I changed that out and still had the same problem. After this I pushed in the contactor and the unit will turn on so I measured for voltage and am not receiving 24 volts to the unit. I just moved into this house so do not know what was done beforehand but we have two thermostats one controls the ac the other the heat. When I measure the voltage across R to Y, or from R to G, I receive 24V. The wiring that is connected at C and Y are going to the outside unit and I do not get any Voltage across here which in turn means it is not sending out the 24V to the AC Unit i believe. The wires connected at Y and C are going directly to the unit outside. The wires at RGY are connected to the thermostat as far as I can tell. I should mention that the fan will come on in any operation. set to on it comes right on. If in auto it will also come on (on the thermostat).

I also double checked the wiring on the thermostat and it looks wired correctly but there are two sets of wire connected to the thermostat but only one set connected to the transformer and the other is just hanging there next to it. home ac units for saleIt will not let me show the picture where the wire is hanging but it is there to the left of the transformer.sale on ac units Is this wired correctly?sizing ac units for home electrical wiring hvac air-conditioning thermostat Browse other questions tagged electrical wiring hvac air-conditioning thermostat or ask your own question. Here's an easy thing you can do to keep your air conditioner running as efficiently as possible: Don't crowd the condensing unit, the outdoor part of your AC. In the photo at left, you see a common problem.

I took this picture at a brand new house a couple of months ago, and there's not a problem right now, but what's going to happen to those shrubs planted around the condenser?As the shrubbery gets bigger, it's going to crowd that condensing unit. When it does, it's going to restrict the air flow across the condensing coil. Remember the articles I wrote about the refrigeration cycle — part 1, in plain English and part 2, in a bit more technical language? If not, now might be a good time to go read them. Basically, the condensing coil is where all the heat that got picked up from your home gets dumped outside. Your AC is engineered to remove the heat by having a designed amount of air flow over the condensing coil. If less air flows over the coil, less heat is removed. That means the whole cycle warms up a bit, and your AC works harder to keep your home cool. You'll pay extra for it in more than one way: (i) Your monthly electric bill will be higher; (ii) your equipment may not last as long, so you'll pay more in repair bills and in having to replace the AC sooner.

There are a lot of ways that condensing units get their air flow blocked. The most common is from plants growing too close to the unit, as shown above. Dirt and leaves piling up around the condenser cut air flow, too. These are things you can easily control by trimming the plants around the condenser and clearing away any debris. If enough dirt gets between the fins of the condensing unit, that's also going to reduce air flow. When you get your HVAC system serviced each year (you do, don't you?), the service tech should check and clean the coil if necessary. Sometimes, the HVAC company creates the problem. The photo below shows one such case. Not only are those condensing units too close to the wall of the house and the fence, they're way too close to each other, too. They're going to be fighting each other for air when adjacent units are running at the same time. This is a terrible installation and should never have passed the building inspection. So, keep some space around your condenser and let your air conditioner breathe!

Building a new home or remodeling your existing home and installing new HVAC systems? We can help with complete HVAC design services.How can you maintain an outside AC unit? Keeping the outside units of air conditioners clean from dust, debris and leaves helps the system to operate with greater efficiency. Trimming landscaping to allow proper airflow helps to prevent future problems. What causes home air conditioners to rattle in your attic? What are some tips for tuning up your air conditioning system? Before beginning any work on an air conditioning system, the owner should ensure power to both the inside and outside units is off at the electrical panel. Most units use 220 volts of electricity, which can be fatal to humans. Grass and weeds tend to grow around the unit and require trimming. Any vines that grow around the unit require removal. Air conditioning coil cleaning products are available at most refrigeration stores. These products help to remove oxidation that causes the system to lose efficiency.

They include instructions for application and flushing of the product without damaging the condenser. A soft brush helps to remove debris that collect between the fins. If any of the fins are bent, the owner should straighten them with a fin comb from the appliance store. The fins are made of aluminum and easy to damage, so it is essential to use caution. The compressor pad should be level. If a carpenter's level indicates settling, the owner should lift it with a pry bar and place gravel under the low end to keep it level. What is a 10-ton air conditioning unit? A 10-ton air conditioning unit is a cooling system capable of removing 120,000 British thermal units of heat per hour from the air in the building to which... Why do air conditioners need filters? Air conditioners need filters to clean debris, such as dust and dirt, from the air. Without a filter, dust and dirt can travel directly to the air conditio... What size air conditioners does Trane sell besides 2-ton?