The next time you're faced with replacing an old steam boiler that was attached to a two-pipe air vent system, try the old-timer's trick. Remember that the replacement boiler is smaller in size and holds less water, thus requiring a boiler feed tank that acts as a reservoir for the new boiler.

In this edition of the Btu Buddy series, the dispatcher calls Bob and tells him a customer has a very frozen heat pump outdoor coil. After checking out the unit, Bob finds a bad fan capacitor.

This article is the third and final part of a three-part series on inspecting and servicing gas appliances. It provides information on furnace operation, combustion analysis, and the limit circuit.

Soldering is a viable method of joining ACR tubing and components while servicing and installing refrigeration systems. However, not all types of solders can be used satisfactorily.

In this installment of the Btu Buddy series, Bob goes on a call where a carbon monoxide detector alarm is sounding off. He finds that a fireplace is contributing to the problem.

This article is part two of a three-part series on inspecting and servicing gas appliances. It covers thermostats/zone sensors, filters, the blower compartment, wiring, and the burner compartment.

This article is part one of a three-part series on inspecting and servicing gas appliances. This part covers infiltration air and the ventilation air test, equipment efficiency, venting, and the three-part testing procedure for checking a heat exchanger.

There is no reason to ever put gauges on an air conditioning or refrigeration system after the initial installation unless a problem with the mechanical refrigeration circuit is suspected. The refrigerant charge can be accurately checked using a thermometer and manufacturer's charging chart.

In this edition of the Btu Buddy series, Bob goes on a call where the customer is complaining about their heat pump blowing cold air. Bob explains the differences between a heat pump and furnace, and makes a couple adjustments to the system.

John Logue was stumped. The contractor designs and installs 55 to 80 HVAC systems a year, but he had never run into this situation - a customer complaining that water was coming out of the homeowner's supply grilles.