We don’t do residential equipment here. Yet, since it’s a Garland, I did a little looking around for you.
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From my little research, I found that Garland discontinued their residential line of products in 1999. However, they offer up information on parts support of those old products. Here’s Garland’s web page for information on that:
Garland Group – ServiceÂ
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Their link to ADCO Parts is bad, so I searched on-line and found this:
http://www.adcoservice.com/brands/older-brandsÂ
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They also claim to offer other services, with one being TECHNICAL SUPPORT:
http://www.adcoservice.com/servicesÂ
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So if you (or a technician) needs technical assistance, ADCO may be capable of that. I’m assuming that they have access to service and parts literature on that unit.
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Call them and see what they can do for you.
Good luck with that.