Frequently-Asked Questions

What are your normal hours of business?
David Gray Heating and Air is happy to serve clients any time you need us! Our regular business hours are 8am to 7pm Monday through Friday and 8am to 5pm Saturday. We can help with issues that arise outside of these hours, but calls made at all other hours are at overtime rates.

What is the cost of a service call?
The basic cost for a service call from one of our heating and cooling technicians is $98.00.

What is the warranty on your service repair?
We are proud of the work we do, and stand behind every service we perform. Our service repair warranty is 30 days for any labor performed, and 1 year for parts replaced.

What is your average response time for a service call?
We strive to answer every service call as quickly as possible. Our typical response time for a service call is between 1 to 4 hours.

How often do I need to have my equipment serviced?
The need for regular maintenance to your unit can vary depending on the age, size and condition of the heating or cooling unit. It is recommended that you have a qualified technician look at your HVAC system a minimum of 2 times per year, or every six months. Having these regular checks done will help keep you aware of any issues with the unit and any possible repairs that may need to be done soon.

Is the diagnostic fee waived if the repair price is approved?
Our diagnostic fee is a separate fee that is not waived once the repair price is approved. The diagnostic fee is charged to cover the cost of the labor to drive to your location and the labor costs involved in the diagnostics.

What brands or units do you service?
Our experienced HVAC technicians are able to service all makes and models of HVAC systems. Some of the brands we specialize in include Carrier, Rheem, Goodman and American Standard.

Does the Technician have all the repair parts I need on his truck?
Our aim on every service call is to repair and restore your HVAC unit to full working order. Our technicians carry universal parts with them in order to be able to service any issue you are experiencing. However, if additional or specialized parts are needed, they are ordered from the factory.

How often do I need to change my filter?
Each heating and cooling system has specific recommendations as to how often you should change the filter. However as a general rule of thumb, a 1" filter should be changed monthly, while a 5"filter can typically last 3 to 4 months. If you are using an electronic air cleaner, the filter should be changed monthly or as needed.

Why do I have water leaking from my air handler?
There is no way to pinpoint the cause of a leaky air handler without having a technician look at your specific unit. In cases where water is leaking, the three most common reasons for water discharging from the air handler are: 1. The drain line is clogged up 2. The unit is low on Freon and the system is frozen up 3. The system is operating too cold (usually below 73 degrees) for 8 to 10 hours and condensation is forming.

Why did my compressor fail?
Compressor failure can be caused by several issues such as: age, power spikes, power failures, low refrigerant, poor installation practices and lack of maintenance. A proper diagnosis may determine the cause of the compressor failure. Once the cause of the issue has been determined, your technician can specify whether it can be repaired or will need to be replaced.

What is the difference between my air handler and my condenser?
The air handler is the inside unit usually installed in the garage, attic or interior closet. The condenser (or heat pump) is the unit on the outside of the home.

How do I know when it is time to repair or replace?
The life span of a unit varies greatly based on many factors, including amount of use, whether or not the unit was well maintained and the size of the unit. Typically, after 10 to 12 years, the cost of repair usually totals more than half the cost of a new system. At this point, it may be prudent to purchase a new unit instead of continuing to pay for repairs.



What brands do you sell?
David Gray Heating and Air is proud to carry several leading HVAC brands, including Carrier, Rheem, Goodman and American Standard

What can I expect to pay for a complete Heat Pump system?
Average entry level heat pump systems usually start around $4,000. This estimate can vary based on the size and brand of heat pump purchased.

What is the warranty on a new HVAC Complete System?
We are proud of the work we do, and stand behind every system we install. Our warranty covers 1 year for labor and 10 years for parts. Individual manufacturers warranties may vary. 

What is S.E.E.R.?
S.E.E.R stands for Seasonal Energy Efficiency Ratio. It is the calculated energy consumption of an air conditioner. The S.E. E.R. rating starts at 14 and goes up, 14 being the standard. Presently you may find system up to 22 Seer ratings.

How much will I save on my electric bill by installing a new air conditioner?
A general savings would be around 30% for a 10-year-old system; this also various from unit to unit, based on S.E.E.R. and Consumption of Electricity based on each homes usage and price per kilowatt from the electric company

What is the Evaporator or "A" Coil?
It is the coil that is installed on the supply air side of the furnace or air handler. In most models the coil is built in the form of the capital letter 'A". Its function is to change the Freon from a liquid to a gas causing a cooling effect. This coil becomes very cold and as the warmer air from the home blows over it, the air becomes cooled and water in the air is removed.

What is the condenser?
It is the part of the A/C system that sits outside. After the Evaporator coil turns the Freon liquid into a gas, the Condenser condenses the Freon back to a liquid. It is also where the compressor is located that pumps the Freon back and forth to and from the evaporator coil. It also pulls air into the system and dissipates the air.

What is the compressor?
It is what pumps the Freon back and forth from the condenser to the evaporator coil. It is located in the condensing unit.

Why is my home hotter on the second floor?
Remember that heat rises and there is a large heat load on the roof of your home. Unless you have a separate system for the second floor, the thermostat will be located on the 1st floor. When the temperature on the 1st floor satisfies, the thermostat turns the A/C system off. If the thermostat is on the first floor it can't recognize the warmer 2nd floor. Proper attic insulation, correctly sized ductwork and Zoning may help the temperature difference.

Is it better to install a larger size A/C than needed?
No. If the A/C is too large, it will "short cycle" resulting in loss of proper humidity removal. Also, it will cool the house too quickly. This will make the house feel cool but damp.

How long does it take to install a new A/C system?
A standard installation takes 6 to 8 hours.

How do I know when it's time to replace my system?
By following these simple guidelines, you can estimate whether or not fixing vs. repairing is the right decision. On average the lifetime of: 1. Standard life expectancy of an air conditioning unit is 10-15 yrs 2. Standard life expectancy of a furnace is 15-20 yrs 3. Standard life expectancy of a boiler is 20+ yrs 4. Equipment at the ocean may last ½ of the above. 5. Consult with your Service Technician to discuss the cost of the repairs verses replacement.

What is R410a?
R-410A is the earth friendly "green" coolant that is replacing Freon(R-22). Since 2010 the Federal law requires that Freon (R-22) will be phased out.

What is R-22?
R-22 is currently being phased out as a common refrigerant. It has a high potential speed along the process of ozone-depletion and as of 2010, the use of this dangerous compound is to be reduced by 75%. By 2015, it shall be reduced by 90%, which will only drive the cost of repair up higher.

Do you have more questions or need clarification on one of the answers given on this page? Contact us to find out more.