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Master
1,524 Answers
- Posted on Dec 26, 2010
Re: Got the pilot light to come on on my intertherm...
Depress the button and relight pilot:
The pilot will not light. Remove the pilot tube at the gas valve and
depress the button. If gas is present at the gas valve and not at the pilot,
check the pilot tube and pilot assembly orifice for blockages; clean or replace
as necessary.
The pilot stays lit. Check the thermocouple for lint or pet hair; clean
if necessary. Check the gas pressure at the inlet and outlet of the gas valve
with a manometer. It should be within the parameters set by the manufacturer
(which can be found on the rating plate or in the installation and operating
manual). If the gas pressure is good, turn on other appliances; does pressure
drop? If yes, check line sizing. If no, check the pilot flame; is it covering
3/8 to 1/2 in. of the thermocouple tip? If not, adjust. Check the condition of
the draft diverter. If damaged, replace it.
If all the above items are within spec, check the thermocouple with a
thermocouple tester or a millivolt meter. If the readings are not within the
manufacturer's specified range, replace the thermocouple. If it's within the
manufacturer's specified range, replace the pilot safety unit or combination gas
valve.
Note: When replacing a pilot safety unit or a combination gas valve,
always replace the thermocouple. If you do not have a thermocouple tester or
millivolt meter, replace the thermocouple; if the pilot still will not stay lit,
replace the pilot safety unit or combination gas valve.
This is the only situation where I would ever recommend replacing parts
before testing, since the thermocouple would be changed with the gas valve.
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