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Old 12-22-2011, 10:15 AM   #16
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Inducer motor runs almost all the time


Tough call. It could just be that the wires touched the cabinet and nothing else.

Thing about new condensers is if you have an old 9 or 10 seer system (from around 10 years ago) and only change the condenser, lowest seer rating made nowdays being 13, then you need to change the evaporator to match the coil to get that benefit of the entire SYSTEM being 13 seer. In many cases with an old evap and a new condenser the seer rating drops.

Anyways, you've been had enough already.

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Old 12-22-2011, 10:34 AM   #17
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Inducer motor runs almost all the time


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Tough call. It could just be that the wires touched the cabinet and nothing else.

Thing about new condensers is if you have an old 9 or 10 seer system (from around 10 years ago) and only change the condenser, lowest seer rating made nowdays being 13, then you need to change the evaporator to match the coil to get that benefit of the entire SYSTEM being 13 seer. In many cases with an old evap and a new condenser the seer rating drops.

Anyways, you've been had enough already.
Wonderful. Yes the old one was a 10 and the new a 13. Electric bills seem about the same though so I guess it's not too bad.

Thanks for your help.
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Old 12-22-2011, 11:24 AM   #18
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Inducer motor runs almost all the time


I'm not sure from these posts if your inducer fan is running nearly all the time or not? If it was a dirty flame sensor that was causing your inducer to keep running then I'd expect your house temp would suffer. If your main flames come on every time and for as long as your thermostat calls for heat, then it's not a dirty flame sensor.
If it turns out the inducer is almost always running, I'm wondering if the tech hooked up the inducer incorrectly. I just can't figure out what connection could cause the inducer to turn off a few minutes before the next heating cycle begins?
Probably just a case of me miss reading the posts here.
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Old 12-22-2011, 03:40 PM   #19
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Inducer motor runs almost all the time


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I'm not sure from these posts if your inducer fan is running nearly all the time or not? If it was a dirty flame sensor that was causing your inducer to keep running then I'd expect your house temp would suffer. If your main flames come on every time and for as long as your thermostat calls for heat, then it's not a dirty flame sensor.
If it turns out the inducer is almost always running, I'm wondering if the tech hooked up the inducer incorrectly. I just can't figure out what connection could cause the inducer to turn off a few minutes before the next heating cycle begins?
Probably just a case of me miss reading the posts here.
I had someone come (2nd floor high pitched roof) and check the vent pipe and it had a slightly smashed cap and a little crap in a bend. I will have a chance to work on it Saturday and I will make sure everything is connected per the diagram.
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Old 12-22-2011, 04:48 PM   #20
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Inducer motor runs almost all the time


reading all the post in here it seems to me that the 1st problem on the unit may have been the flame sensor......now it looks as if you now have a bad board..or the wrong board installed in furnace.....sorry you had so much bad dealings with contractors....ben
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Old 12-23-2011, 08:58 AM   #21
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Inducer motor runs almost all the time


Success! Looks like the smashed cap on the vent pipe was enough to cause the problem. The guy who went up on the roof and fixed it said it was not too bad in his opinion, but it must have been enough to cause the problem.

So to summarize: In the beginning the heater would frequently fail to light and after a few attempts the control board would stop trying for one hour (good to know). Probably at this time it was the fault of the Electronic Flame Sensor and my wife told me this morning that it was cleaned on the first service call. $150.

Wife convinces me to replace Thermostat - $100.

Then we started having other problems apparently related to back pressure on the vent pipe. The tech then replaced the control board which made no difference. $300

After searching this forum I found info on possible vent issues and now we think the cap on the roof was the victim of our last hail storm.

Interesting!

Thanks everyone for your help.


Last edited by rwllc; 12-23-2011 at 09:34 AM.
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