Question about Taco SR504-2 4 Zone Switching Relay

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Loud buzz when engaged

Taco SR 504 emits loud buzz when zone 2 engaged. Turns off when zone thermostat lowered.

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I have a hot water system that uses baseboard heaters with two thermostats. the pump is activated through a Honeywell R845A. Is the R845A the problem?


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One of my heat zones doesnt close when the thermostat is OFF.


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Rheen PVW50 Hot Water Heater Making Buzzing Noise and Doesn't Light


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Every water heater problem is Rheem.
And Rheem doesn't post any service manuals, like the other two big manufacturers, AO Smith-American, and Bradford White.

Copy following link for troubleshoot by gas control valve.
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1 Answer

I need help with a buzzing sound in my air conditioner.


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Programmable thermostat for Taco zone valve


Hi there, this mechanical t-stat you are using now, does it just open and close this zone valve on a call for heat to fire the burner also? What voltage is this thermostat, 24, 120, or even 220 volts? I need to no this so I can locate the stat you need to replace the old mechanical stat. Let me know exactly what all this stat controls, any fan, or just the burner and zone valve. I need to know the wiring configuration of the existing stat. This will make for a faster locating of the new stat. I can get you a stat that you can control just about any combination's of what ever and that's why I need to know voltages and amount of wires available to me to work with. This I thank you for. Contact me and I will get to you as soon as I am available today.
Sincerely,
Shastalaker7

Jan 17, 2010 | Honeywell CT87B ROUND HEATING&COOLING...

1 Answer

Loud buzzing noise with Whirpool microwave oven when it comes on. All lights, heating and fan seems to work but not sure why loud buzzing. What is the problem?


The loud buzzing you hear is the sound of the magnatron tube.That is what emits the microwave radiation and buzzing should be normal. The mag tube may be nearing its end at witch time you will hear no buzzing and hence no heating of foods. Replacement can be costly depending on the model so most people just opt for a new one. Hope this helps

Jul 30, 2009 | Microwave Ovens

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