Recirculatory Heater Units; Fresh Air Ventilator Units : Somerford Mini ...

Recirculatory Heater
The recirculatory heater was so called because it received air only from the cabin and did not have a duct supplying it with fresh air from outside the vehicle.
It is most commonly to be found on very early Minis, since it was gradually phased out from 1963 onwards. In theory, lowly 850 Saloons and some export
1000 saloons retained the recirculatory heater as standard fitment until the early 1970s (in reality, most customers asked for the optional fresh air heater
instead), while Vans and Pick Ups persisted with it all the way through until the end of the 1970s. Very occasionally 'new old stock' late-model Van and Pick
Up heaters come to light in dusty warehouses, but usually it is up to you to restore your old heater unit. The radiator or 'matrix' can be replaced as can the
fan motor; we offer a reconditioning service for your matrix should you prefer it. Right hand drive and left hand drive heaters differ in the position of the matrix
inlet and outlet pipes - however the matrix is the same, and is simply mounted different ways round in the RHD and LHD heaters.

Often referred to as the 'fug-stirrer', the recirculatory heater would make already stale cabin air quite revolting after a prolonged drive, while its demisting
abilities were non-existant (actually, it often made visibility worse). One for the purists and masochists only! Although ostensibly the same right the way
through production, detail changes did occur - most importantly to the heater casing at the start of 1960 (the 1959-60 heaters not even
having demister flaps to divert all of the airflow to the windscreen) and in 1969 (Saloons) and 1970 (Vans and Pick Ups) when the change was made from
positive to negative earth electrical systems. Note that the fan motor changed on each occasion. All recirculatory heaters can be interchanged as complete
assemblies, so long as the vehicle's electrical system polarity is observed and the fan motor wiring modified to suit if necessary. You wouldn't want the fan
going backwards, would you?

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
1	-	HEATER ASS'Y, recirculatory, without demister flaps	1	1959-60, positive earth.
2	-	HEATER ASS'Y, recirculatory, with demister flaps	1	1960-1969/70, positive earth.
	-	HEATER ASS'Y, recirculatory, with demister flaps	1	1969/70-80, negative earth.
3	SH604041	SCREW, heater to body	3	1959-60.
4	LWZ204	WASHER, locking	3	1959-60.
5	SH604041	SCREW, heater to body	2	1960-80.
6	FNZ104	NUT, heater to body	2	1960-80.
7	LWZ204	WASHER, locking	4	1960-80.
8	PTZ603	SCREW, self tapping, heater case assembly	8/10	Qty. 8 required for 1959-60 heaters.
9	37H579	SPRING, demister flap, RH	1	1960-80.
10	37H580	SPRING, demister flap, LH	1	1960-80.
11	17H2096	MATRIX, heater, new	1	Reconditioned also available - please enquire.
12	17H2096SET	SEAL SET, matrix, four pieces	1
13	27H1550	FAN, heater	1
14	37H425	SCREW, fan to motor shaft	1
15	27H1551	MOTOR ASSEMBLY, fan	1	1959-60, positive earth.
16	27H1837	MOTOR ASSEMBLY, fan	1	1960-1969/70, positive earth.
	37H4758	MOTOR ASSEMBLY, fan	1	1969/70-80, negative earth.
The 37H4758 motor may be used on positive earth cars so long as the wiring connections are swapped over to suit.

Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
17	53K124	SCREW, motor to heater	3	1959-60.
18	LWZ403	WASHER, shakeproof	3	1959-60.
19	AJD8012Z	NUT, motor to heater	2	1960-80.
20	LWZ403	WASHER, shakeproof	2	1960-80.
21	57H5260	SWITCH, fan, adjustable rheostat type	1	1959-74.
22	27H9229	SWITCH, fan, 'on-off' barrel type	1	1974-80.
	2H4841	SWITCH, fan, 'on-off' barrel type	1	1974-80; alternative.
23	13H250	KNOB, switch	1	For rheostat switch.
24	13H7901	KNOB, switch	1	For barrel switch.

Fresh Air Ventilating Units
Fresh air ventilating units were offered as an option to non-heater fitted cars, usually those destined for warmer climates. They are all based on the 1963 on metal or plastic bodied fresh air heaters, being more or less a heater unit with the fan and motor but without the heating matrix and water plumbing.
The 1969 on unit used in Saloons and Estates was modified to include a second fan and similar controls to concurrent heater-fitted models.

Metal Case Fresh Air Ventilator
Saloons and Estates 1963-68
Vans and Pick Ups 1963-80
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
25	-	VENTILATING UNIT ASS'Y, fresh air	1	1963-70, positive earth.
	-	VENTILATING UNIT ASS'Y, fresh air	1	1970-80, negative earth.
26	17H8609	MOTOR ASSEMBLY, fan	1	1963-70, positive earth.
	37H4215	MOTOR ASSEMBLY, fan	1	1970-80, negative earth.
27	17H8108	FAN	1
28	17H6836	CLIP, fan to motor	1
	27H602	COLLET, fan to motor	1	Alternative to clip.
29	27H646	SCREW, motor to casing	3
30	LWZ303	WASHER, locking	3
31	AJD8012Z	NUT	3
32	17H8612	SEAL, motor to casing	1
33	7H6924	GROMMET, motor wiring	1
34	17H8609	PLUG, unused holes in casing	4
35	27H8235	SWITCH, fan control	1
36	24A151	KNOB, lever	1
37	PJZ602	SCREW, self tapping, casing assembly	18
38	17H8617	SCREW, self tapping, lever plate to casing	3
39	FNZ104	NUT, unit to body	1
40	LWZ204	WASHER, locking	1
41	PWZ104	WASHER, plain	1
42	PJZ1004	SCREW, self tapping, unit to body	2
43	PWZ203	WASHER, plain	2
44	PFS310	NUT, Spire	2

Plastic or Metal Case Fresh Air Ventilator
Saloons and Estates 1968 On
Ill. No.	Part No.	Description	Qty. Rqd.	Remarks
45	-	VENTILATING UNIT ASS'Y, fresh air	1	1968-69, positive earth, plastic case.
46	-	VENTILATING UNIT ASS'Y, fresh air	1	1969-74, negative earth, plastic case.
	-	VENTILATING UNIT ASS'Y, fresh air	1	1969-84, negative earth, metal case.
	BMP364	VENTILATING UNIT ASS'Y, fresh air	1	1984 on, negative earth, metal case.
47	37H3925	MOTOR ASSEMBLY, single fan type	1	1968-69, positive earth, plastic case.
48	37H4912	MOTOR ASSEMBLY, twin fan type	1	1969-74, negative earth, plastic case.
	37H7214	MOTOR ASSEMBLY, twin fan type	1	1969 on, negative earth, metal case.
49	17H8108	FAN, RH mounting	1
	BAU2329	FAN, LH mounting	1	1969 on.
50	17H6836	CLIP, fan to motor	1/2
	27H602	COLLET, fan to motor	1/2	Alternative to clip.
51	24K2085	GROMMET, fan motor mounting	3	1968-69.
52	17H1289	DISTANCE PIECE, fan motor mounting	3	1968-69.
53	37H3923	KNOB, lever	1	1968-69.
54	BAU1923	KNOB, lever	1	1969 on.
55	YUF101090	SWITCH, fan control	1
56	24A2753	ADAPTOR, demister hose	2
57	24A2752	SEAL, demister hose	2
58	FNZ104	NUT, unit to body	1/2	Qty. 1 used 1968-69.
59	LWZ204	WASHER, locking	1/2	Qty. 1 used 1968-69.
60	PWZ104	WASHER, plain	1/2	Qty. 1 used 1968-69.
61	PJZ808	SCREW, self tapping, unit to body	2
62	13H5146	NUT, Spire	2

Monday:	09.00am to 17.30pm
Tuesday:	09.00am to 17.30pm
Wednesday:	09.00am to 17.30pm
Thursday:	09.00am to 17.30pm
Friday:	09.00am to 17.30pm
Saturday:	09.00pm to 12.00pm

Recirculatory Heater Units; Fresh Air Ventilator Units

SEAL-DEMISTER HOSE TO BODY-PLASTIC HEATER '68-'74

KNOB-CONTROL LEVER-PLASTIC HEATER-'68-'69 ( NOT GERMANY)

DISTANCE PIECE-FAN MOTOR MOUNTING-PLASTIC HEATER '68-'69

SCREW-SELF TAPPING,PAN HEAD-No.10 x 1/2''

KNOB-HEATER CONTROL LEVER-'63-'69 ( NOT GERMANY)

USE: RFR103

SEAL-RUBBER-MOTOR TO CASING-HEATER UNIT 63-68,VAN&PICK.69-80

SCREW-MOTOR TO HEATER CASING

COLLET-FAN TO MOTOR-HEATER UNIT '63-'84 & EXTERNAL 4KW FAN

CLIP-FAN TO HEATER MOTOR '63-'84 & EXTERNAL 4KW FAN

FAN-HEATER UNIT '63-'69 , EXT.4KW FAN '59-69 & RH MOUNT 69-74

SCREW-SELF TAPPING PAN HEAD-No.6 x1/4''

We accept