Service & Maintenance

Btu Buddy 26: Checking A Heat Pump With Dirty Indoor Coil

In this installment of the Btu Buddy series, Bob examines a heat pump system and finds the airflow is low. He discovers that the problem is a dirty coil.
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Avoiding TXV Trauma

To ensure maximum TXV performance, here are some tips on bulb mounting/location, brazing, valve orientation, external equalizer use, superheat adjustment, and troubleshooting.
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Btu Buddy 25: Changing A Four-Way Valve On A Heat Pump

To finish the job they were working on last week (see "Btu Buddy 24: Looking At A Heat Pump Drawing A Lot Of Power"), Bob meets Btu Buddy at the jobsite to change the heat pump's four-way valve.
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Energy Recovery Wheel Maintenance

The maintenance requirements of filters, blowers, and motors are well known, but familiarity with energy recovery wheels is not as high. Understanding and implementing maintenance requirements for energy wheels will improve performance, effectiveness, and the life of the wheel.
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Btu Buddy 24: Looking At A Heat Pump Drawing A Lot Of Power

In this edition of the Btu Buddy series, Bob must diagnose a heat pump problem at a home where the power bill has risen dramatically in the last two months. Btu Buddy assists him in troubleshooting the system.
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Gas Furnace Maintenance

This article provides recommended gas furnace maintenance procedures. The performance and operation of the furnace should be checked every year. This ensures the furnace owner of receiving the best possible performance and comfort from the equipment.
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Btu Buddy 23: Handling A Frozen Outdoor Coil On A Heat Pump

In this installment of the Btu Buddy series, Bob finds a frozen outdoor coil on a heat pump that will not defrost. Btu Buddy helps in determining the problem.
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Water Quality Guidelines For Evaporative Cooling Products

A proper water treatment program, administered under the supervision of a competent water treatment specialist, is an essential part of routine maintenance to ensure the safe operation and longevity of evaporative cooling equipment. Here are some treatment tips.
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Btu Buddy 22: Finding Excess Heat Exchanger Scale

In this edition of the Btu Buddy series, Bob goes on a no heat call and finds some large pieces of scale laying on a burner surface. Btu Buddy notes there are several possibilities for excess heat exchanger scale and helps Bob pinpoint the source.
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Heat Pump Electrical Component Checks

In performing service and troubleshooting on heat pump systems, there are various electrical components to be checked. This article provides information to aid in inspecting and servicing these components.
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Chris Mathis, president of Mathis Consulting Co. and vice chair of ASHRAE’s residential ad hoc committee, talks about ASHRAE’s exploration into the residential market. Posted on Oct. 17.

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