SL/R107: '86 560 SL Heater Issue
07-04-2016, 11:45 PM
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1986 560 SL
'86 560 SL Heater Issue
Greetings All,
New fella on the block here.
I recently had my 560SL's A/C system converted from R12 to R134. I had heat before the conversion, now none.
My mechanic did the following: "First swap climate control unit with known good unit, no heat. Inspect newly installed Mono valve, ok. Swap temperature control unit with known good unit, no heat. Electrical testing of signal to mono valve and aux water pump at 12.8volts from 0 volts, good. Checked inlet heater hose temp at 135 deg and the outlet is approx. 70 deg, should be closer to inlet hose temp. The signal to aux pump can be manipulated to obtain heat."
Any suggestions?
Thanks much,
Rob
New fella on the block here.
I recently had my 560SL's A/C system converted from R12 to R134. I had heat before the conversion, now none.
My mechanic did the following: "First swap climate control unit with known good unit, no heat. Inspect newly installed Mono valve, ok. Swap temperature control unit with known good unit, no heat. Electrical testing of signal to mono valve and aux water pump at 12.8volts from 0 volts, good. Checked inlet heater hose temp at 135 deg and the outlet is approx. 70 deg, should be closer to inlet hose temp. The signal to aux pump can be manipulated to obtain heat."
Any suggestions?
Thanks much,
Rob
