We had AC installed a few weeks ago, starting 2 nights ago we're getting error 45 on a Rheem high efficiency, gas furnace, which means the low pressure switch is open when the inducer is at high speed. I'm not sure, but it seems more than a coincidence that this started happening just a few weeks after the work was done.
They sent a tech out to check it, and he said the problem was probably the line was clogged because when the furnace was installed, about 6 years ago by a diff company, they ported it outside and directly into the ground. He cut the pipe so now it just empties out onto the ground and got it running again. A few hours after he left, it errored out again. The after hours guy came last night, fiddled around, checked the pressure, clogs etc...checked some of the connections and such, and got it going again saying that he thought maybe the previous error code hadn't been fully cleared out. It was running when he left, only to have it error out again after an hour or two. It will still run, but just blows cool air out the vents.
I know it could just be a faulty pressure switch or something like that, but it seems odd that it will run for a bit, then error out vs. just not working at all.
Any ideas on what might be causing this?
Thanks!
They sent a tech out to check it, and he said the problem was probably the line was clogged because when the furnace was installed, about 6 years ago by a diff company, they ported it outside and directly into the ground. He cut the pipe so now it just empties out onto the ground and got it running again. A few hours after he left, it errored out again. The after hours guy came last night, fiddled around, checked the pressure, clogs etc...checked some of the connections and such, and got it going again saying that he thought maybe the previous error code hadn't been fully cleared out. It was running when he left, only to have it error out again after an hour or two. It will still run, but just blows cool air out the vents.
I know it could just be a faulty pressure switch or something like that, but it seems odd that it will run for a bit, then error out vs. just not working at all.
Any ideas on what might be causing this?
Thanks!
source https://hvac-talk.com/vbb/showthread.php?2225971-Rheem-Error-Code&goto=newpost
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