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My roof top a/c unit blows the controller fuse every time the fan comes on. compressor working fine. disconnected blower motor wires and fuse still blows. brand name is domestic.
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this fuse probably controls the ac clutch operation and/or the blower fan motor.. Disconnect the ac clutch at the connection next to the clutch pack behind the pulley. fit new fuse and if it blows then the problem will be in the fan motor control/ motor. If not then it will be the ac compressor clutch pack
lost operators, manual.
sun roof, can be 3 things
fuse
jammed
motor. dead.
3 fuse boxes (iml looking on online fsm)
fuse box 3 contains, fuse 32 and 45.
fuse 32 runs , "IG2-SIG-15a)
roof, and quote:
Radiator fan relay #1
Radiator fan relay #2
Radiator fan relay #3
A/C compressor relay
Seat heater switch (Driver side)
Seat heater switch (Passenger side)
Sliding roof unit
Blower motor relay
unqout
id bet it is not the fuse. see why? the blower, would be dead.
fuse 45: all is only S/R that is the label too.
this box is long and skinny
with 3 relays on left
and
2 fuse top
11 fuses, in horz middle.
10 fuses on bottom row. fuse 29 bottom right.
fuse 39 center right
and top 2 are 51 and 50 , left to right
Belief it or not your problem may be at one off your electric fans, also a possibility your a/c compressor coil shorted, so disconnect your a/c condenser fan and your a/c compressor check them for short and replace has needed, here is the logic every time you turn your heater on defrost it will cycle your a/c and it will blow your fuse, there is a circuit breaker on fuse box by left kick panel way up make sure it is in good condition push on it and you will feel it click if trigger, is not spring back it may be at fault to, replace it. good luck
When the blower works only on the high setting its usually a bad blower resistor which is right near the blower motor. now you say it would always blow high regardless of the fan speed setting that would indicate probably the climate control unit or a connector problem somewhere. finally it not working at all may be the climate control unit or connection went bad even further. it might have a blown fuse or a bad blower motor in addition to the climate control unit or connector problem .check for power and ground at the blower motor. the power is supplied from fuses and may have a relay also. the ground is supplied from the climate control unit and goes through the resistor to control the fan speed. good luck
If the Air comeing out is the same as the temp inside the RV make sure the compressor is running and not just the fans. It could be low on freon. If freon is ok then you would need to ck the wiring to the selector switch for a short. It would be obviouse because there will be melted wires. I am leaning toword low on freon since you have already been inside the wiring/control unit.
Either a bad blower motor or blower motor resistor. If the air is
coming from the defroster only, check for a disconnected or broken
vacuum line under the hood by the passenger firewall.
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