This month’s troubleshooting situation centers around a standard natural gas, induced draft, hot surface ignition system furnace. This is a new installation that has been accomplished in anticipation of the upcoming heating season, and the problem is that during the initial start-up, the unit did not perform properly.

Bob and Tim are at a new customer’s job site. It’s an older, free-standing restaurant, and the complaint is that the ductwork is dripping water into the customers’ food.

The equipment in this month’s troubleshooting situation has been around a while. Installed in 1999, the unit is a Nordyne brand, Model #S3BA-60K, and the customer requesting service explained to the dispatcher that they have had to replace fuses in the disconnect several times.

Bob and Tim were on a service call at a new customer’s house. The complaint was that the humidity in the house seemed to be high because mold was growing — shoes in closets and wooden object were the worst. The summer weather was very hot, and there was also high humidity.

This month’s troubleshooting situation involves an air-to-air package unit heat pump that is approximately nine years old, and the customer’s complaint is that rather than providing cooling, it’s just blowing warm air.

Bob and Tim have just repaired a leak on a 10-ton commercial air conditioning system and are ready to charge the unit. The system has a thermostatic expansion valve (TXV) for the evaporator.

Your role in this month’s troubleshooting situation is providing a second opinion on a failed compressor diagnosis. The customer’s complaint is that the unit isn’t cooling properly — the equipment is a heat pump package unit that is just past the warranty period for the compressor.

Bob and Tim just arrived at the house of a new customer. The customer explained to them that he just started up his air conditioner for the first time this spring. There was a warm spell, and the system didn’t work. As a matter of fact, it didn’t cool — the outdoor unit did not run at all. Bob explained to the customer that they would get started looking at the system and figure out what was going on.

In this month’s troubleshooting situation, you are dealing with a 4-ton split system, and the locale is a desert Southwest city. The customer in this case is the landlord, and they are working on the residence, getting it ready to rent after the departure of a long-term tenant. Their description of the problem is that the house “just won’t get comfortable.”

Bob and Tim are at lunch after tuning up an oil burner. When they arrived at the job the home was cold and the oil burner was burning erratically if burning at all. They gave the system a tune-up, started the furnace, and decided to take a lunch break while the furnace heated the house. Then they were going back to do a combustion check on the furnace to make sure that it was set up for the best combustion.