Okay here's the low down . . . Pilot light sayed lit all summer. First cool day we fired her up and all was good . . . or so we thought. Pilot light out . After several relights we called a tech out. he changed the thermocoupler(sp?) and tried it. seemed okay.I asked him to cycle it a few times because we found that it was going out when the burner shuts down. So after a few more tries, the pilot goes out again. He then trries to clean out the pilot line. Same result. After checking the burner he concludes, "it must be the gas valve". Installs - checks - gets $400.00 all told - leaves - all good. . . get home from work this morning and the house is at 60F. I have a call out for him to come back, however in the mean time I have a few Questions.
Is it normal to not use any meters or other equipment to test valves or thermocouplers? He said there is no way to test them. Have you ever seen this before? What else could the problem be? Doesn't this mean the gas valve was NOT faulty and I should get (at least) the cost of the part back? The specs on my boiler are as follows:
Viessmann Atola Model GLN-25 Installed in 1983
TIA
Mike