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Troubleshoot a honeywell smart valve SV9501M2056

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Switch on wall fireplace with Honeywell control SV9403, pilot does not turn on even there is current flowing into the controller device.

Good Evening. Your fireplace is equipped with a smart valve (SV) to which the valve itself acts as the control. This unit has intermittent pilot or hot surface ignition. Can you clarify to me which ignition this unit has?

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Honeywell Ignitor clicks several times before actually igniting, replaced old one, still have the same problem. Also replaced the smart valve.

check air filter is clean , or jump out pressure switch see if it lights, check hoses to pressure switch are not split or blocked

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Gas furnace with Honeywell smart valve code error 6:2, replaced the following: pressure switch, smart valve, ignitor flame sensor and control board. Cleaned out the condensate line. Still getting 6:2 flash...

Hello, it sounds like your Furnace might be shutting off due to your high limit switch.A limit switch will open when the furnace overheats due to low airflow, . check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor. Anything that restricts airflow will cause a limit switch to open.

Mar 08, 2011 | Honeywell Heating & Cooling

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My Furnace does not turn on. Installed a new igniter/flame rod assembly, still not coming on (I had this same problem before with another furnace which I changed the igniter flame rod and problem was...

Assuming the inducer fan and pressure switch are working fine, your next step is to test the voltage coming to the gas valve. There should be 4 wires going to the gas valve, one is black. This is the 24 volt power side. Unplug the molex connection at the gas valve and while the inducer is running test for 24 volts AC. If you get voltage you have a bad valve. If no voltage you have a bad circuit board. Test the safety circuit and roll-out sensors to make sure all switches are closed. Check for continuity across the switches.

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4 Answers

My Ruud Furnace wont stay lit

Hi Bmreid
The problem you describe sounds pretty much like your gas valve is going bad. There is a brand by Honeywell called a Smart Valve which is anything but smart, when the electronics in the valve start going bad the furnace will run great for a day or two and then the next day may not run at all and then an hour later my run and then an hour later may not run again. Very sporadic operating furnace is usually the Honeywell Smart gas valve going bad.

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