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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
Posted to alt.home.repair,sci.electronics.basics,sci.electronics.repair
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Real post: Rheem heater fan won't shut off, need advice
I have been having an intermittent Rheem air conditioner/
heater problem. The blower won't shut off unless I cut the main power. The furnace shuts off fine. Switching off the fan or anything on the thermostat won't shut it off. The technician says that they won't repair it unless they find it dead. By the time the technician arrives the AC is working again because it usually fails at around 1-4AM then resumes working again at 5AM. I am now deciding to replace the parts myself but need some help. I'm not certain but I think the symptoms point to the blower relay D7 or the fan cycle control switch F7 on this schematic diagram http://www.freewebs.com/acrepairs/RHEEM.jpg. Where is the fan cycle control switch is located in the Rheem heater - is it inside the furnace? Thanks Tim |
#2
Posted to alt.home.repair,sci.electronics.basics,sci.electronics.repair
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Real post: Rheem heater fan won't shut off, need advice
Tim Zeifer wrote:
I have been having an intermittent Rheem air conditioner/ heater problem. The blower won't shut off unless I cut the main power. The furnace shuts off fine. Switching off the fan or anything on the thermostat won't shut it off. The technician says that they won't repair it unless they find it dead. By the time the technician arrives the AC is working again because it usually fails at around 1-4AM then resumes working again at 5AM. I am now deciding to replace the parts myself but need some help. I'm not certain but I think the symptoms point to the blower relay D7 or the fan cycle control switch F7 on this schematic diagram http://www.freewebs.com/acrepairs/RHEEM.jpg. Where is the fan cycle control switch is located in the Rheem heater - is it inside the furnace? Don't know the Rheem brand but usually it's the fan/limit module either being set too low for the shut-off temp or the module is broken. Considering that it's cold this time of the year the chance that it's broken is high. This link seem sto explain it pretty well: http://toad.net/~jsmeenen/blower.html -- Regards, Joerg http://www.analogconsultants.com/ |
#3
Posted to alt.home.repair, sci.electronics.basics, sci.electronics.repair
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SPAM--not an answer -- [email protected] (was: Rheem heaterfan...)
Mordred9 wrote:
[SPAM link] Spew: http://groups.google.com/groups/sear...lter=0&num=100 abuse@ telekomunikacja.pl |
#4
Posted to alt.home.repair, sci.electronics.basics, sci.electronics.repair
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Real post: Rheem heater fan won't shut off, need advice
On Dec 5, 2:03 pm, "Tim Zeifer" wrote:
I have been having an intermittent Rheem air conditioner/ heater problem. The blower won't shut off unless I cut the main power. The furnace shuts off fine. Switching off the fan or anything on the thermostat won't shut it off. The technician says that they won't repair it unless they find it dead. By the time the technician arrives the AC is working again because it usually fails at around 1-4AM then resumes working again at 5AM. I am now deciding to replace the parts myself but need some help. I'm not certain but I think the symptoms point to the blower relay D7 or the fan cycle control switch F7 on this schematic diagramhttp://www.freewebs.com/acrepairs/RHEEM.jpg. Where is the fan cycle control switch is located in the Rheem heater - is it inside the furnace? Thanks Tim Do you mean the fan that circulates the air through the house, assuming it is a forced hot-air, cold air furnace? There is a switch that controls when the blower is on, in the heating cycle, that keeps the blower running until the plenum temperature goes below a certain level so that as much heat as ppossible is extractred. If that switch contact is physically sticking, the blower will run continuously. But you indicate turning the main power switch off and then back on fixes the problem, so unless there is mechanical vibration when you cycle the power, there is something else going on. |
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