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Rick, Construction Supervisor
Category: Plumbing
Satisfied Customers: 21527
Experience:  Licensed Master plumber with 40+ yrs. experience.
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My water heater is reading Flammable vapor sensor lockout.

Customer Question

my water heater is reading Flammable vapor sensor lockout. How do I resolve?
It is a Richmond 40gal power vent
Submitted: 2 years ago.
Category: Plumbing
Expert:  Rick replied 2 years ago.

What is the model number of your unit? how do you set the water temp? a dial? 2 arrows?

Customer: replied 2 years ago.
It is a 6GPR40PVE2-40
temp is set by dial
Expert:  Rick replied 2 years ago.

I can't find any specs on this model. Is it power vented (fan on top)? can you post a picture of the gas control valve?

You can post a picture here by clicking on the paper clip icon in the toolbar at the top of this dialogue box. You can only post from a PC or a Mac not a phone or a tablet. If that doesn’t work for you then you can upload a pic to a file sharing service like OR

and post the “share” link to your picture here or you can email the pic to customer service but the last option can take quite a while to get tome. Click on the CONTACT US link to contact customer service.

Customer: replied 2 years ago.
As specified; it is a power-vent; Richmond 40 gallon water heater. Model # *****
Expert:  Rick replied 2 years ago.

Looks like the sensor is missing in the first picture. The unit won't operate without one in place.