Fireplace help

JTScribe · Nov 23, 2021

We heat our living room with a freestanding Blaze King Pegasus 9202 gas (propane) stove. Came home today and the pilot light was out. I figured it was probably an issue with the thermopile, and I had a spare one, so I replaced it. Same issue.

Did some more testing, and it turns out that both the thermopiles I have hit 300 mV under direct flame, which is supposed to be enough to trip the valve to stay on. With a meter on the leads, I go past 300 pretty quickly. When I have the leads tied into the valve, it takes much longer and never goes over 200. I'm thinking maybe the solenoid inside the valve is bad, but I just wanted to hit up the hive mind here and see if anyone has any experience or thoughts.

patience0830 · Nov 23, 2021

JTScribe said:
We heat our living room with a freestanding Blaze King Pegasus 9202 gas (propane) stove. Came home today and the pilot light was out. I figured it was probably an issue with the thermopile, and I had a spare one, so I replaced it. Same issue.

Did some more testing, and it turns out that both the thermopiles I have hit 300 mV under direct flame, which is supposed to be enough to trip the valve to stay on. With a meter on the leads, I go past 300 pretty quickly. When I have the leads tied into the valve, it takes much longer and never goes over 200. I'm thinking maybe the solenoid inside the valve is bad, but I just wanted to hit up the hive mind here and see if anyone has any experience or thoughts.

Calling @churchmouse

churchmouse · Nov 23, 2021

JTScribe said:
We heat our living room with a freestanding Blaze King Pegasus 9202 gas (propane) stove. Came home today and the pilot light was out. I figured it was probably an issue with the thermopile, and I had a spare one, so I replaced it. Same issue.

Did some more testing, and it turns out that both the thermopiles I have hit 300 mV under direct flame, which is supposed to be enough to trip the valve to stay on. With a meter on the leads, I go past 300 pretty quickly. When I have the leads tied into the valve, it takes much longer and never goes over 200. I'm thinking maybe the solenoid inside the valve is bad, but I just wanted to hit up the hive mind here and see if anyone has any experience or thoughts.

As with anything related to this it’s tough to diagnose over the inter webs.
If I understand your trouble shooting the Mv drop off when you measure at the valve with heat on the Thermopiles. This could be a bad valve. But again diagnosed without putting eyes/hands on it could be misleading.

indyjohn · Nov 23, 2021

churchmouse said:
As with anything related to this it’s tough to diagnose over the inter webs.
If I understand your trouble shooting the Mv drop off when you measure at the valve with heat on the Thermopiles. This could be a bad valve. But again diagnosed without putting eyes/hands on it could be misleading.

Hi Mr. Mouse. Hope you are managing the day.

churchmouse · Nov 23, 2021

indyjohn said:
Hi Mr. Mouse. Hope you are managing the day.

Doing our best.
And you as well.

Jaybird1980 · Nov 23, 2021

JTScribe said:
We heat our living room with a freestanding Blaze King Pegasus 9202 gas (propane) stove. Came home today and the pilot light was out. I figured it was probably an issue with the thermopile, and I had a spare one, so I replaced it. Same issue.

Did some more testing, and it turns out that both the thermopiles I have hit 300 mV under direct flame, which is supposed to be enough to trip the valve to stay on. With a meter on the leads, I go past 300 pretty quickly. When I have the leads tied into the valve, it takes much longer and never goes over 200. I'm thinking maybe the solenoid inside the valve is bad, but I just wanted to hit up the hive mind here and see if anyone has any experience or thoughts.

I've seen the circuit board on a couple gas valves have cracked solder joints. Not sure of what gas valve you have, but it might be worth checking the underside of the wire plug and see what it looks like.

JTScribe · Nov 24, 2021

Thanks, guys. I'll let you know what I find.

JTScribe · Nov 25, 2021

Got the valve taken out, thankfully based on the number on the back, it’s one of the more common ones and it wasn’t too expensive. Got one on the way while I tinker with the old one.

churchmouse · Nov 25, 2021

JTScribe said:
Got the valve taken out, thankfully based on the number on the back, it’s one of the more common ones and it wasn’t too expensive. Got one on the way while I tinker with the old one.

Please do not attempt to repair the old valve. Nothing good comes from this. Trust me on this one.

JTScribe · Nov 25, 2021

churchmouse said:
Please do not attempt to repair the old valve. Nothing good comes from this. Trust me on this one.

Don't worry, I'm too lazy to put it back in just to take it back out when the new one arrives.

I just want to take a look at the circuit board.

Jaybird1980 · Nov 25, 2021

JTScribe said:
Don't worry, I'm too lazy to put it back in just to take it back out when the new one arrives. I just want to take a look at the circuit board.

The couple I fixed the circuit board was just under the plastic plug held on with a screw.
Both were cracked around the pins for the wiring to plug into. Just solders it back up and it worked, didn't even have to remove the gas valve.

DeadeyeChrista'sdad · Nov 30, 2021

A Blaze King, huh? Not worth a poop. I'll be glad to help you out and haul it off. Just let me know when to pick it up....

JTScribe · Nov 30, 2021

DeadeyeChrista'sdad said:
A Blaze King, huh? Not worth a poop. I'll be glad to help you out and haul it off. Just let me know when to pick it up....

I looked at replacements for about ten minutes before I noped out of there. For what they are structurally, it's nuts how much they cost.

DeadeyeChrista'sdad · Nov 30, 2021

JTScribe said:
I looked at replacements for about ten minutes before I noped out of there. For what they are structurally, it's nuts how much they cost.

True. I run an old school princess, and have a king on backup in the garage. Every time I look at the new ones I about go into defib.

JTScribe · Dec 3, 2021

Update! I got the new valve a couple of days ago and finally got a chance to put it in tonight.

Unfortunately, it looks like the valve wasn't the problem. On the bright side, I didn't spend that much, and it was 30+ years old, so nice to have a spare.

There is a thermal cutout wired in series between the wire for the pilot magnet in the valve itself; when I did an ohm check on it cold it had zero continuity. Doh! On the bright side, I can run without it in the meantime and not throw money out the window on electric heat.

@DeadeyeChrista'sdad , you have anywhere I can look for replacement parts? My Google-Fu is falling short.

It's item 22 on page 24 of this doc:

https://www.blazeking.com/wp-content/uploads/2018/11/OM-PEGASUS-9200.pdf

I imagine any standard TCO would work, but they don't even list the specs as far as I can tell.

Cameramonkey · Dec 3, 2021

Have you reached out to the manufacturer? They appear to still be in business.

churchmouse · Dec 3, 2021

JTScribe said:
Update! I got the new valve a couple of days ago and finally got a chance to put it in tonight.

Unfortunately, it looks like the valve wasn't the problem. On the bright side, I didn't spend that much, and it was 30+ years old, so nice to have a spare.

There is a thermal cutout wired in series between the wire for the pilot magnet in the valve itself; when I did an ohm check on it cold it had zero continuity. Doh! On the bright side, I can run without it in the meantime and not throw money out the window on electric heat.

@DeadeyeChrista'sdad , you have anywhere I can look for replacement parts? My Google-Fu is falling short.

It's item 22 on page 24 of this doc:

https://www.blazeking.com/wp-content/uploads/2018/11/OM-PEGASUS-9200.pdf

I imagine any standard TCO would work, but they don't even list the specs as far as I can tell.

TCO usually has a temp range on the piece.

DeadeyeChrista'sdad · Dec 4, 2021

I'd check Amazon.

JTScribe · Dec 4, 2021

churchmouse said:
TCO usually has a temp range on the piece.

It's labeled F250, I assume that's 250 Fahrenheit?

Of course, when I search for F250 snap disconnect or thermal cutout, I get tons of truck parts. :lmfao:

churchmouse · Dec 4, 2021

JTScribe said:
It's labeled F250, I assume that's 250 Fahrenheit?

Of course, when I search for F250 snap disconnect or thermal cutout, I get tons of truck parts.

Yup thats a high limit safety. Send me a pic of it. There are only a couple of different styles.

Fireplace help

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