Gas and Oil Home Heating Furnaces - furnace
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Fred
12-30-03, 06:49 PM
I have a Williams wall furnace model 25GV-5T Nat. The tenant told me there was no heat. I took the thermostat off and put the wires together and it worked i went a bought a new thermostat, installed did not work. If I jump at the control body it will light most of the time. In the past any thermocoupling that was bad was bad not in between, is it possible that the thermocoupling could be my problem?? How can I check to make sure? Also where can I buy a thermocoupling for a Williams, this thing has two electric leads, different from anything I`ve seem before? Thanks Fred PS I live in the San Jose, Cal area.
hvac4u
12-30-03, 08:00 PM
jumping wires at tstat works, but new tstat does not? correct tstat? different ones for millivolt system, what kind of unit do you have?
HVACELECT
12-30-03, 09:02 PM
ok sounds like a iginator not a thermocouple does this systemhave a standingpilot
Ed Imeduc
12-31-03, 02:48 PM
A lot of the wall furnaces have a millivolt set up in them. This makes the power to open the gas valve they are call a genertator and a thermopile. Now if you have this for sure you have to also have the right Millivolt tstat. A regular thermostat will not work here for you .;) ED
Fred
12-31-03, 06:55 PM
Originally posted by Ed Imeduc
A lot of the wall furnaces have a millivolt set up in them. This makes the power to open the gas valve they are call a genertator and a thermopile. Now if you have this for sure you have to also have the right Millivolt tstat. A regular thermostat will not work here for you .;) ED
You are right on both counts. On this unit I have a generator not a thermocouple, something new to me. I installed a new generator and all is great, the thermostat was OK. Thank you for the help Fred
A lot of the wall furnaces have a millivolt set up in them. This makes the power to open the gas valve they are call a genertator and a thermopile. Now if you have this for sure you have to also have the right Millivolt tstat. A regular thermostat will not work here for you .;) ED
You are right on both counts. On this unit I have a generator not a thermocouple, something new to me. I installed a new generator and all is great, the thermostat was OK. Thank you for the help Fred