Original message
| sjmamiller
 |  "Rheem 90 Pressure Switch"
, posted Sat 23 Feb 10:38  
Can someone please give me the correct part number for a Rheem 90% pressure switch? I have to have the service company out at least once a year (for the past 6 years) to replace the pressure switch. The pn on the box I have is Protech 42-24196-81. I can only seem to locate 42-24196-82 or 42-24196-83 and I am wondering if the -82 & -83 part numbers have replaced the -81 pn. Any help would be appreciated!
SJM
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Replies:
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| yuri
| "Re(1):Rheem 90 Pressure Switch" , posted Sat 23 Feb 10:53
Only a Rheem parts distributor would know. I find it hard to believe that they fail every year. Has anyone checked the draft on the ventor fan ("WC) with a manometer? It may be borderline and the switches on some Rheems need to be repositioned or the hose altered so that condensation does not get trapped in the hose. Someone likes selling you switches? You may have a venting problem instead.
Yuri
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| | sjmamiller
| "Re(2):Rheem 90 Pressure Switch" , posted Sat 23 Feb 11:03
The problem is that my builder located the dryer vent in close proximity to the air intake for the furnace. Not very smart!! I need to get it re-located, but doing so is difficult based upon the location.
SJM
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| | yuri
| "Re(3):Rheem 90 Pressure Switch" , posted Sat 23 Feb 13:43
By venting I meant your intake/exhaust pipes may be too long/restricted and causing the switch to trip. Sucking in dryer fumes is very bad for the unit also. The chemicals from fabric softener will corrode and damage your heat exchanger.
Yuri
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| | sjmamiller
| "Re(4):Rheem 90 Pressure Switch" , posted Sat 23 Feb 13:49
yes. I understand. I had that checked out and was told everything was in spec. Several of the tech's that have checked it out tell me they believe that the dryer lint is causing the problem with the pressure switches.
SJM
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| | dwcaveney
| "lint" , posted Sun 24 Feb 23:45:
Lint is listed by NFPA as explosive material. In California some jurisdictions, now require arc fault breakers, in bedroom circuits. I was told by an San Francisco BI that the lint from bedding, clothing, etc will go into the eletrical outlets and cause arcing. Sure wouldn't want any possiblity of lint in the combustion of gas appliance. Your techs are right! Your general contractor knows his stuff.
DW
[this message was edited by dwcaveney on Mon 25 Feb 08:45] |
| | yuri
| "Re(5):Rheem 90 Pressure Switch" , posted Sat 23 Feb 13:54
Fumes are eating the diaphram inside the switch. Real bad for the heat exchanger also. If it goes under warranty Rheem will examine it and possibly void the warranty. Can the furnace be vented vertically thru the old chimney? or to a different wall. You need a permanent solution to this problem. Or check if that unit is certified for single pipe use. That is where the combustion air is taken from the inside of the house and the intake pipe is not used. May lose 1-2% efficiency. I think most Rheems are.
Yuri
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