I've had problems with my fireplace every year I've been in this house (8 and counting). The wires have been loose, the thermocouple and thermal disc have been replaced, the valve was replaced twice in one season, methane has been added to the tank, yet the unit does not work properly for an entire winter. Is this a particularly faulty unit, or perhaps defective? We've had the sales rep from Richmond (50 miles) here three times to no avail and extra $$$. The local propane company has been here thrice also. The house and unit are 10 years old, so age isn't the problem.... Is it time to toss this unit? Thanks!