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  1. 35-Modulating Gas Valve Fault and 34-Ignition Fault - HVAC-Talk

    Aug 18, 2024 · Around 2 years ago, the furnace wouldn't turn on. The "system events" screen showed numerous 35-Modulating Gas Valve Fault and 34-Ignition Fault messages.

  2. Modulating vs 2-stage - HVAC-Talk

    Mar 28, 2021 · The original furnace was 75k BTU 1 stage. I currently have a new 2 stage VS Amana 60k BTU but the contractor is removing it due to staging algorithm issues they can't figure out (long …

  3. Which thermostats support modulating furnace? - HVAC-Talk

    Feb 18, 2008 · I'm considering installing a Rheem modulating furance. The contractor who quoted me the Rheem furnace is quoting it with a Honeywell Pro 8000 thermostat. My understanding is that in …

  4. Fully Modulating Furnace, Regular or Communicating...

    Nov 15, 2009 · So how do you get a fully modulating furnace MODULATE in 1% increments as it should do with a HoneyWell Round regular thermostat? I guess, at least, it has to be a 'digital' regular …

  5. How does a modulating furnace modulate? - HVAC-Talk

    Aug 5, 2011 · As stated, YORK's modulating furnace works using runtimes and algorythms. The system can either use a communicating stat that will tell the furnace exactly what it needs, or it can use a …

  6. Modulating VS 2 Stage VS Single Stage - HVAC-Talk

    May 9, 2023 · The ideal solution is a modulating furnace with or without the communicating thermostat. Modulating allows the furnace to lower the capacity 35% on Lennox. 40% on Carrier. The modulating …

  7. Luxaire (York) modulating furnace issues - HVAC-Talk

    Jan 21, 2008 · Over the last few months my supervisor has asked me to look at a few modulating luxaire furnaces that he installed for clients. He's only installed four of these particular models and all were …

  8. Is Carrier 59MN7A060... really a modulating furnace? - HVAC-Talk

    Dec 22, 2012 · I am looking at installing a Carrier furnace: 59MN7A060V17-14. The product booklet says ‘Fully Modulating Gas Valve — When paired with the InfinityR control, this furnace improves …

  9. Is this modulating furnace oversized on the quote I got?

    Jan 17, 2019 · I have quotes to replace my gas furnace. Two-stage quoted at 3 ton / 70k BTU. Modulating quoted at 3 ton / 90k BTU. Contractor said this size is normal because modulating can …

  10. Modulating furnace question - HVAC-Talk

    Dec 20, 2022 · A modulating furnace that runs mostly on low shouldn't cause problems with energy bills or durability, but for significantly less money, I have found that a 2 stage 40K furnace covers most …