Family-owned gas fireplace repair serving Lake Terrace

Direct vent, B-vent or a log set

Three quite different gas appliances can sit behind a fireplace opening, and each is serviced to its own instructions. A sealed front, a draft hood and an open firebox fail in different ways, so a check that fits one can mislead on another.

One direct vent manual puts the difference plainly. Its units draw all of their combustion air from outside through the vent pipe, while the natural vent units in a companion manual must be installed with the draft hood in the same air pressure zone as their combustion air inlet.

At the start of a visit in Lake Terrace, the appliance type is the first thing named on the estimate. Vent-free units are routed to our ventless gas fireplace service, and the three types this repair service covers are these.

• A direct vent unit with a sealed glass front
• A natural vent, or B-vent, unit with a draft hood
• A decorative gas log set in a fireplace built for wood

The air shutter and a sooty flame

The air shutter lets a measured amount of air mix with the gas before it burns. According to one insert installation manual, the shutter is set at the factory for the minimum vertical vent run, may be adjusted for longer runs and should be opened to give more air if sooting occurs.

That manual gives a table of settings by model and gas, and the owner manual's service list asks the technician to confirm the setting and check that the shutter is clear of dust and debris. A shutter that has been moved or clogged changes the flame even when every other part is sound.

It is a technician setting, made at installation and checked on service, not an owner adjustment. We compare the shutter on your Lake Terrace fireplace with the manual's setting for its vent layout, correct it where the manual allows and list any soot damage it has already caused on the estimate.

Soot on the logs, glass or firebox top

Black marks on the logs, the inside of the glass or the top of the firebox are a symptom, not dirt. Manufacturer manuals treat sooting as a fault with a cause, and cleaning it off without fixing that cause only resets the clock.

In one maker's charts, sooting glass is traced first to flames striking the logs, which means the logs are off the diagram, then to a blocked injector or air intake and to the gas supply. An insert maker adds the air shutter setting to that list.

We find where the flame is striking and why, correct what the manual calls for and list any cleaning or damaged parts on the estimate for your Lake Terrace home. The causes named across those manuals include these.

• Logs moved off the maker's diagram
• An air shutter closed past its setting
• Embers or rock wool over the burner ports
• A blocked injector or air intake

Gas log sets in a wood-burning fireplace

A gas log set sits in a fireplace that was built to burn wood, and Florida's fuel gas code treats it as a decorative appliance. It is listed to ANSI Z21.60 and installed by the maker's instructions. Apart from manually lighted natural gas sets listed to ANSI Z21.84, a set must light its main burner with a pilot, an ignitor or a direct ignition device and carry a flame safeguard that cuts the gas if ignition fails.

That makes a log set repair a matter of the set's own burner, pilot and safeguard, checked against its maker's manual and label much like any vented gas fireplace. The code allows these sets only in approved solid fuel-burning fireplaces, so the fireplace around the set is part of the picture too.

Existing log sets are repaired here, starting with the label, the ignition type and the safeguard. If a set is beyond repair or you want a new one, that work goes to our gas log installation service and appears as a separate option on your estimate.