Question about Heating & Cooling
I can see the ignitor glow red but it wont lite
Try jumping out the presure switch and see if it lights , check hoses are not split or blocked
Posted on Jan 23, 2013
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Posted on Jan 02, 2017
yes if the ignitor has a very small crack on it it will not work replace it and see if it works but do not touch the end that glows when you put it in as the grease from your finger s will stop it working
Posted on Jan 08, 2009
sounds more like a pressure switch problem. If the pressure switch does not make, then the furnace will not attempt to light. Its a safety feature on residential furnaces.
Check the pressure switch and hose for obstructions. Clear any and attempt to re-light. If still not successful, its time to contact a local service company to check the gas valves and electronics.
Posted on Apr 27, 2010
This is only a suggestion for you as I do not have all the Dayton manuals available. So I would be looking at the pilot assembly and what we are looking for is a thermocouple or possibly a photo electric eye. The click from the gas valve may only be for the pilot to ignite and not the burners yet. If there is a thermocouple try cleaning it with steel wool and positioning it over the top center of the pilot flame, also check where the thermocouple connects to the gas valve and make sure it has a snug connection. Should it be the photo electric eye type of sensor you can try cleaning it off with a soft rag, and make sure it has an unobstructed view of the flame. From what you describe it sounds as if it is not getting signal that a pilot has been established. This is why I am pointing you in this direction.Trace your wiring both to and from the gas valve as there may be other safety sensors in line.Should you run in to one check it with a volt ohm meter and it should register normally closed, if open there you are. Take your time and power down the unit to trouble shoot please.
Posted on Jan 10, 2011
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1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch (or circuit breaker ) back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution:You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands (use gloves). If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.
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