Gas and Oil Home Heating Furnaces - heater makes buzzing sound...

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robstang
10-26-03, 02:41 PM
i was wondering if i could help with my heater. i went turn it on today and itdid turn on but there is a loud buzzing sound coming from the main unit. i have a Intertherm heater and ac unit in one. sorry for the non technical terms, im a computer guy not an hvac man. please help.

GregH
10-27-03, 06:42 PM
robstang:

The buzzing is either from the fan motor or more likely a relay that is worn out.
To fix this yourself you will have to open the electrical cover to troubleshoot this.
If unfamiliar with controls and high voltage electricity, a service call to a reliable company would be in order.
robstang
10-28-03, 12:01 PM
hey thanks for the info GregH. i did as you suggested as far as opening the electrical cover to troubleshoot this and found that the buzzing sound was coming form a relay. there doesnt seem to be much to replacing it. would you recommend trying to replace it? im sure i can find the part either locally or online. is it difficult? im pretty knowledgeable in electronics and computers.

GregH
10-28-03, 03:12 PM
robstang:

If you can work safely around electricity then it wouldn't be difficult to replace.
To properly diagnose the relay you could first check to make sure you have 24 volts at the coil if a low voltage relay.

Make sure you get an exact replacement or you will be having to sort out the wiring to connect it.