Sunheat SH1500RC BB, Repair Manual, Page: 13 / 25

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How To Replace The Quartz Infrared Heat Tubes
!!Unplug The Heater Before Servicing!!
(Remember That The Edges Of The Metal Are Sharp. Use Caution)
Remove both left & right cover panels from the unit. To see exactly which heat tube is burned out you will have
to plug the heater in and turn it on. Wait until the heat tubes start to glow an orange color. The heat tubes are
wired in series of 2 so if one tube burns out, it may cause the heat tube that it is wired with to stop working as
well. After determining which heat tubes are not working shut unit off & unplug. Wait until the unit has cooled
off enough to be worked on.
(Keep Track Of How The Wires Are Connected So You Can Reconnect Them
The Same Way Later). From the right side of the unit (Right & left sides are determined when looking at the
unit from the back panel). Find the wires that belong to the heat tubes that are not working. Unscrew the wing
nuts that connect these two lamps together. Then from the left side (The side with the copper ovens) find the
wires that belong to the heat tubes that are not working and unscrew the wing nuts. Remove the screws that hold
the heat tube suspension brackets in place & remove the heat tube. At this point you can inspect the condition of
the heat tubes that you removed to determine which heat tube needs to be replaced.
(If unsure of the heat tube
that is burned out go ahead and replace both lamps) Install the new heat tube(s) in the same way you
removed the old ones.
Replace Front (Long) Heat Tube
Both side panels and rear panel need to be removed. The removal of 5 additional screws from the top of the
unit will need to be done as well
(See photo below for screw location). After the removal of the side panels,
rear panel and the 5 screws from the top, the entire mainframe can be slid back to allow access to the front heat
tube
(See photo on next page). After gaining access to the front heat tube, remove the screws from 1 of the 2
brackets that hold the heat tube in place. Disconnect wires & replace the burned out tube with a new one.
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