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Old 02-16-2014, 09:52 AM   #1
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Older Weil McClain Boiler Problems


Hi,
We're having problems with our furnace (hot water, not forced air). The furnace buzzes and tries to light but then times out and doesn't light at all OR the furnace buzzes and then does light but only stays on for a short bit and then shuts off again. We've had a repairman here 3 times: 1. replace the circulator pump as the pipes out of the furnace weren't equally hot - fixed and replace the relay as it was getting two hot - replaced and new relay gets equally hot. 2nd time -replaced the pilot assembly - no change. Now they are recommending replacing the gas valve. The furnace buzzes like an old transformer which seems to be an electrical problem esp. with the relay still getting so hot but they disagree. Any ideas? Help please.

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Old 02-16-2014, 10:44 AM   #2
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Older Weil McClain Boiler Problems


If the gas valve is getting a steady 24 volts then it should supply gas to the pilot and light it. If not there is an electrical problem. Relays can buzz and get warm but if the valve is old and sticking then yeah it may need replacing.

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Old 02-16-2014, 10:51 AM   #3
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Older Weil McClain Boiler Problems


Quote:
Originally Posted by fizkowie View Post
Hi,
We're having problems with our furnace (hot water, not forced air). The furnace buzzes and tries to light but then times out and doesn't light at all OR the furnace buzzes and then does light but only stays on for a short bit and then shuts off again. We've had a repairman here 3 times: 1. replace the circulator pump as the pipes out of the furnace weren't equally hot - fixed and replace the relay as it was getting two hot - replaced and new relay gets equally hot. 2nd time -replaced the pilot assembly - no change. Now they are recommending replacing the gas valve. The furnace buzzes like an old transformer which seems to be an electrical problem esp. with the relay still getting so hot but they disagree. Any ideas? Help please.
Electrical problem is #1 So let start to look @ this from what I see is you have a gas forced hot water unit. Check power in to unit 115v and power out of the transformer 24v if you have that check for what is buzzing what it the volts. *Furnace buzzes and then does light but only stays on for a short bit and then shuts off again.* most of the time its is a flame senor or controller when this happens

Get A new tech they well send one.
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Old 02-16-2014, 12:40 PM   #4
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Older Weil McClain Boiler Problems


Quote:
Originally Posted by fizkowie View Post
Hi,
We're having problems with our furnace (hot water, not forced air). The furnace buzzes and tries to light but then times out and doesn't light at all OR the furnace buzzes and then does light but only stays on for a short bit and then shuts off again. We've had a repairman here 3 times: 1. replace the circulator pump as the pipes out of the furnace weren't equally hot - fixed and replace the relay as it was getting two hot - replaced and new relay gets equally hot. 2nd time -replaced the pilot assembly - no change. Now they are recommending replacing the gas valve. The furnace buzzes like an old transformer which seems to be an electrical problem esp. with the relay still getting so hot but they disagree. Any ideas? Help please.
pipes would not be equally hot if burnners not work properly...relays can buzz touching them sometimes quiet them thus able to replace bad one... did the tech test voltage and amps of system ..if not get a new tech...ben sr
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