Reliability is especially important because when a furnace failed, 77 percent needed significant work.

The first to numbers are the plant number and the second two are the year.

How would you report on the presence of a lennox PULSE furnace.

Thanks.

A service bulletin was issued for a free inspectiontesting, and if a problem was found, the exchanger was replaced under recall.

I believe most problems occurred around the 4-5 year of age mark.

That means that even though replacing a furnace can be expensive, your costs will be paid back over time through lower energy bills.

If youre replacing your gas furnace or buying a new one, youll want to check the results of the latest reliability survey by the Consumer Reports National Research Center.

The survey covers 21,132 natural-gas furnaces bought between 2008 and early 2014.

A majority of those broke down completely, with nearly a third producing no heat for more than a day.

Otherwise, repairing rather than replacing a furnace might make more sense.

If your furnace is on the fritz, try the following before you call a contractor or start shopping, and see our gas furnace buying guide( ) for more details.

Loose wires or a thermostat malfunction could also cause heat problems.

If your thermostat runs on batteries, try changing them.

Ensure your safety.

Every home with a gas or oil furnace should have a carbon-monoxide alarm on each floor and near (not inside) an attached garage.

Test the alarm weekly, vacuum it monthly, and replace it every five years.

Dont remember how old the alarm is Look on the back for the manufacture date.

For more information on gas furnaces including features to consider, consult our gas furnace buying guide.( ) Mary H.J.

Farrell.

Lennox Pulse Furnace Model Numbers