Does ammonia kill fleas?
Ammonia does kill fleas. You should comb your pet with a flea comb in order to remove the fleas on its coat. Then, dip the comb in a bowl filled with hot water mixed with 1 to 2 drops of ammonia.
I would think that it would help, but I don't think it will resolve your problem if it's in your carpet, furniture... I would hire an exterminator that backs up his/her work