EMCO Tech Heating & Cooling BLOG

When your air conditioner stops cooling, the cause is usually one of a handful of problems — restricted airflow, an electrical component that failed, a refrigerant leak, or a compressor on its way out. This AC troubleshooting guide walks you through the quick checks you can do yourself and the symptoms that mean it's time to bring in a technician. EMCO Tech Heating & Cooling repairs air conditioners across Philadelphia, Montgomery, Bucks, Chester, and Delaware counties with same-day service.

Choosing between a tank and tankless water heater affects your monthly utility bills, available hot water, and how much space you give up for equipment. Both styles heat water reliably, but they differ enough in cost, lifespan, and daily performance that the right choice really comes down to your household's hot water habits and budget.

If your boiler stops heating, starts leaking, or keeps shutting down, the right call matters. This guide explains who fixes boilers, when you need a boiler repair technician instead of a plumber, and which warning signs should never be ignored in Philadelphia homes with gas, oil, steam, tankless, or hot-water heating systems.

Ever wonder what actually happens when you lower the thermostat? Central air conditioning is not magic, it is a simple loop that moves heat out of your home. Understanding the main parts and how they work together makes it easier to spot problems, talk to a technician, and keep the system running well. Here is how central air works, in plain English.

Picking the wrong water heater size leads to two common problems: running out of hot water halfway through the morning, or paying to heat and store more water than your household ever uses. Getting the size right comes down to a few factors, including how many people live in your home, your peak hot water demand, and whether you're considering a tank or tankless system.

The compressor is the heart of your air conditioner, and the most expensive part to replace. When it starts to fail, you may notice warm air, strange noises, or a system that trips the breaker. Knowing the early warning signs can save you from a costly summer breakdown. Here is what a failing AC compressor looks like, what causes it, and your options.

A commercial HVAC system rarely fails all at once - it warns you first. Warm air, short cycling, musty odors, uneven floors, and creeping energy bills are early signals that something is wrong. This guide decodes the 12 clearest signs your commercial heating and cooling system is failing, what each one means, and when it's time to call a professional.

Your AC hums, clicks, dims the lights, trips the breaker, or starts and stops. That is AC hard starting, and every rough startup stresses the compressor. Learn the common causes, how a hard start kit works, when capacitor replacement is the better fix, and when to call EMCO Tech for AC repair.

An AC recharge sounds simple, but it's often the wrong fix. Central air systems are sealed, so low refrigerant usually means a leak. In this post, we break down what a proper repair includes, why topping off can lead to repeat problems, how refrigerant type affects pricing — from older R-22 to R-410A and the newer low-GWP A2L refrigerants like R-32 and R-454B now replacing it — and what to do next if your system keeps coming up low.

Your AC is running but blowing warm air instead of cold. When the blower works but the air never gets cold, the cooling cycle itself has usually failed — think low refrigerant, a frozen coil, or a bad capacitor. Here's how to tell which one you're dealing with, what you can safely check yourself, and when to call a technician.