First of all let me say this is a great forum providing much information and detail to those of us that are not professionals or educated in the HVAC field.
Ok - I appreciate responses/opinions on trying to make a decision as to repair or look into replacing my current furnace.
We've been in the house for 7.5 yrs now and from what I've been able to determine, the furnace appears to be a Goodman-Janitrol 150k BTU manufactured in early 1996 making it about 9 years old. The model is GMP 150-5, serial # 9603807006. (There is also central AC and that unit is of unknown origin and age although it appears to maybe be the original unit installed for the house - 1979)
We are now experiencing our 2nd problem in the past 2 years. Last year, we had a circuit board/card and the ignitor replaced. At the time, the Tech suggested to us that we think about replacement as the unit 'was not high quality' and he estimated it at somewhere around 70-75% efficient. We decided to just go with the repair and when/if we encountered another problem, think about replacement then. Also, the April Aire Model 560 humidifier stopped working at the end of the last heating season as well.
Well, now we have another problem...and it appears to be intermittent (although now its happening more regularly). The exhaust fan comes on, minute or so later the burner lights.....stays lit for about 30 seconds and then goes out. Does this twice and stops. At the times that it works, the burner intially comes on, goes out and the blower comes on....burner lights (for the second time) and it works.
At this time, I'm a bit confused as to the pro's and con's of having this problem repaired. I know that it could be a simple fix and fairly inexpensive. However, since this is the 2nd problem in 2 years.....I have to also wonder about the Tech's statement about it not being a quality unit. I was all set to look into replacement until my research uncovered that this unit is probably 80% vs. the 70-75% the Tech indicated. Initially, I was all set to upgrade to a 90%.....but if this unit is less than 10 years old........
Also, I know my AC unit is REALLY old and costing me an arm and leg to operate.......but.....it is getting close to Xmas and money is kinda tight. But.....I wanna make the right decision as we plan on being in the house for many years.
Advice/help is greatly appreciated.