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Avatar for Dawson Mechanical Contracting
Dawson Mechanical Contracting
4.8(
136
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+12 more

Serving Annandale, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 1988

Free estimates

Emergency services offered

"My wife and I moved into our home about two years ago and inherited a very old hot water heater (12+ years old) and boiler (25+ years old).  They were working fine, but they were on their last legs and could go at any time.  More importantly, 2 of the 3 upstairs bedrooms were always cold, little heat reached those rooms through the baseboard radiators, and we wanted to see what could be done to get it fixed.  This was very important to us since one of those rooms was going to be used as a nursery the following month.
I spoke to Dave on the phone who set up an appointment for the next day to investigate.  He assessed the water heater and boiler, letting me know that they were currently working fine, explained how it worked, and that the boiler was missing a safety feature that is now required in newly installed boilers (I think it was something like an expansion tank?).  He explained it very well, I could tell he knew what he was talking about.  To solve the cold bedrooms riddle, Dave walked around the basement, looking at the exposed pipes and where they were headed.  Then he went to the rooms on the first floor, noting the locations of the radiators.  Finally he went to the 2nd floor to see where the rooms were and the radiator locations.  He found that the rooms were connected just fine, but that they were on the end of a long loop of rooms being heated.  The 2 bedrooms were located on the same zone as the entire first floor, and as a result, were not being heated effectively.  In addition, the thermostat was on the first floor, meaning once the desired temperature was reached on the first floor, the system shut down, leaving the 2nd floor in the cold.  To fix, he recommended adding a third zone by reconnecting the 2nd floor pipes in the basement directly to the boiler and connecting a new 2nd floor thermostat to the boiler so that it would continue working until the 2nd floor rooms were warm.
It should be pointed out that the original intent of my service call was not to get a new boiler, but to fix the heating problem on my 2nd floor.  The 3rd zone solution complicated things with my older boiler, which would have had to be retrofitted with a bigger opening to accommodate the 3 zones.  Dave advised that rather than spending money on those enhancements, which would go to waste if and when my boiler dies, that I may have wanted to consider getting a new boiler.
My wife and I agreed to the work and we scheduled an appointment a few weeks later to get the work completed.  On Day 1, they replaced the water heater and did some work on the 2nd floor piping in the basement.  On Day 2, they replaced the boiler and connected all 3 zones, including the new 3rd zone.  The crew was excellent, putting down drop cloths around the house where they were walking around to drain the radiators and cleaning up behind them.  When the work was completed, Dave walked me around and showed me what they did and gave me a tutorial of how the new thermostat worked.  Everything worked perfectly and the upstairs bedrooms are now nice and warm!
Dave came back a few days later and dropped off the invoice, warranty, and completed rebate details (all I had to do was fill in my address and mail it out).  He also asked how things were going and answered some questions for me, including how I could adjust temperatures in the room using the radiators.
All in all, I think I got my money's worth and would recommend Dawson to my friends and family for any heating work.
"
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+20

Response time7 hrs
Response rate99%
7 neighbors recently requested a quote
Avatar for AJ Perri, LLC HVAC
AJ Perri, LLC HVAC
4.1(
24
)
Central A/C - Service or RepairCentral A/C - InstallCentral Air Cleaner - Install or Replace+3 more

Serving Annandale, NJ and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"They were a fantastic team of workers and office staff. We were very pleased with them and highly recommend them. We had a hybrid system with a heat pump to replace our heating and a/c. Matt, John, Jim and Gavon worked on our project."
New system installation
118 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Protocol Air
Protocol Air
4.5(
11
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Annandale, NJ and surrounding areas

Approved

In business since 2021

Free estimates

Emergency services offered

"The technician was very professional and was able to answer many of my questions about the condition of my HVAC system that I inherited and its probable lifetime. I sensed that he was being honest and straightforward. Rather than accept his extensive list of possible replacement parts, I opted to have him install the one that he believed to be the most urgent- the capacitor. So far the unit seems to be functioning well."
Response time6 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for Gold Medal Service, LLC (South)
Gold Medal Service, LLC (South)
3.7(
420
)
Central A/C - InstallCentral Air Cleaner - Install or ReplaceCentral Humidifier - Install or Replace+1 more

Serving Annandale, NJ and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"My central air quit during a nasty heat wave and they responded quicklyâ within a few hours a technician arrived that evening, followed shortly by the salesman when I decided to replace instead of repair. The job was scheduled for the very next morning! The installers were on time, friendly and cleaned up the areas. Everyone I dealt with was knowledgeable and professional. Interest-free financing was a huge selling point. Very good experience!."
Get Up To $1000 Off A New Cooling & Heating Sy
$79 AC Tune-Up + Up To 1 Lb. Refrigerant
GM Tech Tune-up
Response time4 days
13 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Cool-O-Matic Acquisition LLC
Cool-O-Matic Acquisition LLC
4.3(
6
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Annandale, NJ and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

Cool-O-Matic LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.\n

3 neighbors recently requested a quote
Avatar for N.S. Home Remodeling/Handyman
N.S. Home Remodeling/Handyman
5.0(
18
)
Window A/C Unit - InstallWindow A/C Unit - Install - For Business

Serving Annandale, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

We offer a small local based company in the Lehigh Valley area, and affordable prices to suit customers needs. Our professional services focuses on guiding the customers through the entire project and completing it in a timely fashion.

Response time3 days
Response rate100%
1 neighbors recently requested a quote
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FAQs for air conditioning projects in Annandale, NJ

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Annandale, NJ homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.