We had a Carrier Performance 93 furnace (Model 58M__) installed with new AC in May of 2008. This year, the furnace would occasionally not kick on when temperature was below thermostat setting.I then reset the thermostat a degree or two and it would work. After a 3 day Christmas trip, we returned to a house at 43*.Not saying you cant go a few years without it, the manufacture recommends it.
) Are high efficiency furnaces really this unreliable?
Am I stuck with a lemon that will need service calls every year? You need to have that unit serviced once a year to avoid problems just like this.
He replaced pinched wires between the gas valve and burner enclosure. The second service tech diagnosed a dirty flame sensor. He said the same furnace can operate for years in one home without trouble, but in another the sensor can get dirty enough to block ignition on a yearly basis.
I came in the house as he was finishing and explained the actual problem. He said that cleaning the sensor is part of a yearly maintenance routine sold by his company. Is Carrier actually marketing a product that will not last a year between service calls?
But always giving the customer more value than the cost of the actual repair is good business, with my techs even a simple short repair requires several checks be made to the system, rarely are they on the scene less than 45 -60 minutes checking everything.
Left to right, top to bottom and front to back...it's checked.Units that use inside air are prong to the flame sensor needing cleaned more often. its the environment the product is working in that causes problems.A dirty flame sensor generally does not prevent ignition. The dirty flame sensor just causes the burner to shut off a few seconds later. I dont think I ever ran into a furnace that would sometimes work for 5 days or so then not work at all due to a dirty flame sensor.Not saying its not the problem but it wouldnt surprise me if it happens again.And yes, the furnace is recommended to have yearly maintenance done.I know I did not pay for a service contract, but I did pay thousands for this system 19 months ago, and I don't think its unreasonable to expect it to work for more than one season before it needs repair.