HVACTECH2 wrote in message
The person coming out should have fixed this the first time. The original
installer was incompetant and should have fixed it right. The service man
is a thief taking advantage of her.

In all honesty Ed you really can't say that without seeing the job.
The 90% or greater furnaces have pipe run limits. in some it's as
little as 30 feet. also each 90 degree el is equivalent to 5 or 10
feet of pipe depending on the model. what if they are at or near the
piping run limit? adding 1 90 degree el can cause major problems. what
the OP needs to do first is get the manual for the furnce in question
and check this.

Agree on the checking the manual, BUT - - - -

If you live in an area that gets a good amount of snow, provisions must be
made to eliminate the problem. If it happened once, it can happen again,
and to not fix it correctly is negligence. If you are in the heating
business you know about degree days, annual snowfall, low temperature
expectations, etc. You design accordingly. If you can't, you are
incompetent and should be bagging groceries.