How to check operation of the pilot safety on the standing pilot furnace.

[@spencerwilliams3385]

Being new to the trade this is one of my favourite youtube channels. In my module book I have the first test labelled as "Pilot Drop Out Test" and the second as "Flame Failure Response Time". The latter test max. 90s for residential thermocouple/thermopile systems.

[@hvactecster79]

Great turorial on thermocouple and solonoid testing for proper operation. Take care.

[@lkylky1730]

Thanks for your lectures. Very helpful and inspiring. May God Bless You.

[@grayfurnaceman]

Welcome GFM

[@grayfurnaceman]

There will be another using a meter to check tcouples maybe tonight. Grayfurnaceman

[@Darvin1964]

Thanks for sharing now i have a better understanding...

[@BURNHOT26]

Williams Enclosed Hearth Heater model number 5001911. Pilot stays lit and main burner not firing up. Attempted to purge the air out of the line via the pilot tube but found minimal gas pressure in line. I heard no gas flow when opening the shut off valve to purge. Replaced integral twin stage regulator out by propane tank. Pressure is audible now and enough to purge line. Pilot light stays lit with blue flame Millivolt reading 30mV on thermocouple. Pilot knob is set to "ON" position. Problem: Turning the control valve to maximum, gas valve not opening. After shutting off pilot light, 180+ seconds later the "click" can be heard of solenoid disengaging from magnet in gas valve. Question: How can the solenoid open and there be no gas coming out to the burners? I'll cut and paste this same question on some of your other videos in hopes of getting it noticed.

[@Rightmorocco]

Thank you for explaining the process, I have just a question : the safety needs min 1volt to be excited but the thermocouple gives max 20mv. You can try with battery. Best regards.

[@grayfurnaceman]

The pilot safety does not need 1 volt to operate. Most are set for 10 MV. A 1.5 volt battery is sometimes used to determine if the pilot solenoid is operable. GFM

[@Rightmorocco]

@@grayfurnaceman thank you

[@grayfurnaceman]

Go for it. GFM

[@DayClanTribe]

GFM, mom had the gas company out to a rental yesterday to turn on service and technician says the gas "woodstove" heater in living-room was missing pilot-operated relief valve (PORV)??? Found this video while searching for such a thing, which doesn't seem to apply, and can only find industrial applications for such a device. Have you heard of such a thing? I plan to call them and get further clarification if it's newly implementation or what.

[@grayfurnaceman]

I have worked in this business for over 40 years and I have never heard of a "PORV" in relation to a gas appliance. The idea of having a relief valve on a gas appliance is a bit scary. It is probably a gas appliance that has no pilot safety. If so, get rid of it. That type of appliance has not been legal in most jurisdictions for over 70 years. It is not safe. GFM

[@juniormarsh1]

I have a question on a boiler if you can help me.

[@greanfinisher4014]

I have around a 1935 Gas Mizer gravity furnace (made in Monroe, Michigan) with the cast iron ring and brass burners. In recent years, it seemed to take far too long for the original thermocouple to activate the Honeywell Type No. C434A pilot safety switch. A week or so ago, I replaced the original thermocouple with a Honeywell Q390A1053 (30mVDC) thermocouple. Even then, it still took too long for the new thermocouple to activate the Honeywell pilot safety switch. I mean, it took anywhere from 2-5 minutes, and I know that the thermocouple was properly adjusted. Actually, the pilot safety switch seemed to be more responsive whenever the furnace was calling for heat. I'm wondering if it's time to replace the Honeywell Type No. C434A pilot safety switch. Any thoughts? Thanks.

[@grayfurnaceman]

First, replace it. You are paying for a new furnace every 10 to 15 years in excessive fuel usage. The pilot safety is failing. I would install a combination gas valve to replace the existing gas chain. GFM

[@greanfinisher4014]

Thanks for the reply, and the very helpful advice! I'll look into replacing the pilot safety switch.

[@greanfinisher4014]

One other question sir. Would the Honeywell C434A 1013 pilot safety switch substitute for the Honeywell C434A pilot safety switch that is currently on the 1935 Gas Mizer gravity furnace? Thanks.

[@grayfurnaceman]

@@greanfinisher4014 It should work ok. GFM

[@greanfinisher4014]

Great. I'll give it a try. Thanks!

[@mt1719]

My gas valve description says "No safety magnet" what does this mean to me?

[@grayfurnaceman]

Beats me. Maybe no pilot safety? GFM

[@rogeraustin7985]

I have very old gas valve pilot light can it works but yet not fully let gas flow is that possible

[@grayfurnaceman]

I am assuming the pilot lights and stays lit. When the manual valve is turned to the "on" position, the main gas does not come on even when the thermostat is turned up high enough to call for heat. This could be no power to the furnace or a thermostat problem. GFM

[@rogeraustin7985]

This does not have a thermostat it's all manually controlled

[@grayfurnaceman]

If there is no power source, the pilot is on and the knob is turned to "on", you either have a failing thermopile or failed gas valve. GFM@@rogeraustin7985

[@SolarizeYourLife]

Do solenoids go bad??? Can you buy a new solenoid if it goes bad??? Is there a tester for the solenoid ??? Because I know the thermal coupler is good...

[@grayfurnaceman]

Yes it comes connected to a new gas valve. Gas valves are considered unrepairable. Be sure the connection to the gas valve is clean and not too tight. GFM

[@miraclemouse1]

GFM, I can light my pilot light, but as soon as I release the valve the pilot goes out. I had the valve depressed, with the pilot lit, for about 2 minutes to give it time to heat up the thermocouple but it still just went out the moment I released the knob. Any idea what it could be? Cheers

[@grayfurnaceman]

If the pilot flame is covering the thermocouple at least 3/8" and is all blue, I would replace the thermocouple first as it is the cheapest and easiest repair. You can also try this video: kzbin.info/www/bejne/hJ_Mgpx4m7d8o8U GFM

[@dennisqwertyuiop]

how much gas keeps flowing if the pilot gets blown off 1 1/2 minutes,, thats lots of gas

[@jm69charternet]

Nice job