Timeline for Condensing furnace short cycling
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Nov 9, 2018 at 20:08 | vote | accept | John D | ||
| Nov 9, 2018 at 20:07 | answer | added | John D | timeline score: 0 | |
| Nov 7, 2018 at 10:55 | answer | added | d.george | timeline score: 0 | |
| Nov 7, 2018 at 3:50 | comment | added | John D | @ThreePhaseEel What I meant by "I don't see a plenum thermostat" was that the only plenum thermostat is in series with the other two limit switches, and causes a trouble code when it opens. I also shorted it out temporarily and the problem still occurs, no trouble code. | |
| Nov 7, 2018 at 3:42 | history | edited | John D | CC BY-SA 4.0 |
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| Nov 7, 2018 at 1:56 | comment | added | John D | @ThreePhaseEel Thanks- I don't have a way to measure the static pressure, but I don't see a plenum thermostat on the wiring diagram. Also this furnace has been working for 12 years and just started having an issue. I looked inside the intake and there's no restriction from the intake to the furnace, and the blower sounds normal. That's about as far as I've gotten on the blower side of the system. | |
| Nov 7, 2018 at 1:38 | comment | added | ThreePhaseEel | What sorts of static pressures are you seeing in your duct system? This easily could be a problem with excess static causing the blower to short-cycle on the plenum thermostat control without the high limit ever getting involved.... | |
| Nov 7, 2018 at 1:06 | history | edited | John D | CC BY-SA 4.0 |
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| Nov 7, 2018 at 0:50 | review | First posts | |||
| Nov 7, 2018 at 3:03 | |||||
| Nov 7, 2018 at 0:46 | history | asked | John D | CC BY-SA 4.0 |