low gas pressure
#1
04-04-02, 02:08 PM
low gas pressure
We bought a house that has gas logs in the fireplace. We've had these before, but have a new problem. The gas pressure is so low that the flames don't even reach the bottom of the logs much less put out any heat. We disconnected the disbursing pipe and checked for blockage. There didn't seem to be any so we reconnected and tried to light, but again, on full pressure the gas barely comes out. I can get more flame from a bic lighter. Any ideas what could be causing this?
TIA
TIA
#2
04-14-02, 06:07 AM
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Hello: lisabtx {TIA}
Depending upon which type of gas log set your referring to, if the unit has it's own gas control valve, the gas valve could be defective. However, it is highly unlikely.
To determine if the delivery gas pressure is low, remove the gas logs inlet connection from the supply line and or remove the entire log set if need be to make room. Then install a log lighter tube. Now fire that up and see what happens.
With the log lighter tube only installed on the gas feed pipe inside the fireplace, there should be plenty of gas volume and large burner flames. If so, the gas supply line is unrestricted. If not, it's restricted. Contact either your gas ultility or a plumber.
If there is plenty of flames with the log lighter tube, the gas log set is the problem. Clearing only the burner holes may not correct the problem. Check for a built in gas orifice inside the inlet side of the burner or installed in the outlet side of the gas valve.
The orifice should be a brass/bronze threaded in fitting with a hole in it. A normal sized metal coat hanger wire may fit inside the hole, or use a drill bit of equal size.
If the hole is blocked or restricted, this may be the source of the problem. Clearing the hole should solve the problem but do not enlarge the hole.
Retail appliance parts dealers can also help determine what the possible problem may be if the main gas supply into the fireplace checks out okay. The dealers are listed in the phone directory.
Should you require additional assistance, kindly use the REPLY button. By doing so, the additional information you add will remain within this posting {Thread} and allow me to post any further helpful advice and suggestions.
Regards & Good Luck
Gas Appliances Forum Moderator
Tom_Bart........"Fast, Fair, Friendly & Highly Proficient"......
TCB4U2B2B.....Company Enterprises.
Energy Conservation Consulting Services & Gas Appliance Problem Diagnostics and Technician Services.
Depending upon which type of gas log set your referring to, if the unit has it's own gas control valve, the gas valve could be defective. However, it is highly unlikely.
To determine if the delivery gas pressure is low, remove the gas logs inlet connection from the supply line and or remove the entire log set if need be to make room. Then install a log lighter tube. Now fire that up and see what happens.
With the log lighter tube only installed on the gas feed pipe inside the fireplace, there should be plenty of gas volume and large burner flames. If so, the gas supply line is unrestricted. If not, it's restricted. Contact either your gas ultility or a plumber.
If there is plenty of flames with the log lighter tube, the gas log set is the problem. Clearing only the burner holes may not correct the problem. Check for a built in gas orifice inside the inlet side of the burner or installed in the outlet side of the gas valve.
The orifice should be a brass/bronze threaded in fitting with a hole in it. A normal sized metal coat hanger wire may fit inside the hole, or use a drill bit of equal size.
If the hole is blocked or restricted, this may be the source of the problem. Clearing the hole should solve the problem but do not enlarge the hole.
Retail appliance parts dealers can also help determine what the possible problem may be if the main gas supply into the fireplace checks out okay. The dealers are listed in the phone directory.
Should you require additional assistance, kindly use the REPLY button. By doing so, the additional information you add will remain within this posting {Thread} and allow me to post any further helpful advice and suggestions.
Regards & Good Luck
Gas Appliances Forum Moderator
Tom_Bart........"Fast, Fair, Friendly & Highly Proficient"......
TCB4U2B2B.....Company Enterprises.
Energy Conservation Consulting Services & Gas Appliance Problem Diagnostics and Technician Services.
