[DeTomaso] A/C condensor fan test results

[Roland Jaeckel]

The original thermostat has a sensor mounted thrue a pipe direct in the 
center of the evaporator. Just behind the evaporator is the heater core. So 
it messures the evaporator temp and not the outlet temp. Both temps should 
ideally identicly. But most of the heater valves don't shut down, so the 
outlet temp is usually higher than the evaporator temp.

Roland


--------------------------------------------------
From: "Tomas Gunnarsson" <guson at home.se>
Sent: Sunday, May 05, 2013 10:54 PM
To: <thomas at hax.se>
Cc: <detomaso at poca.com>
Subject: Re: [DeTomaso] A/C condensor fan test results

> It's been many years since I replaced the stock thermostat but
> technically they should not be very different in operation. The stock
> thermostat uses a sensor in the outlet of the heater box. You set the
> knob to provide a certain outlet air temp. This means that if the outlet
> air is too warm it will keep the ac running full time. This could happen
> even if you set the thermostat to a temp way above 0 C.
>
> Tomas
>
>
> <-----Ursprungligt Meddelande----->
> From: Thomas Tornblom [thomas at hax.se]
> Sent: 5/5/2013 9:53:24 PM
> To: detomaso at poca.com
> Subject: Re: [DeTomaso] A/C condensor fan test results
>
> 2013-05-05 19:35, Tomas Gunnarsson skrev:
>> The original controller is nothing but a thermostatic on-off switch.
>> There is also no other way to run the compressor than on/off. As long
> as
>> the system has over-cooling capacity the switch will turn on and off
> but
>> when it's not enough to keep the temp down it never stops. The
> solution
>> to de-icing the evaporator is as simple as turning the AC off and
>> keeping the heater fan running.
>
> But isn't the bulb for the thermostat mounted to the evaporator? So by
> setting the switching point above freezing it should never ice, no?
>
> I know that you have a simple room thermostat, which does not provide
> any means of sensing if the evaporator is getting too cold.
>
>>
>> Tomas
>
> Thomas
>
>>
>> <-----Ursprungligt Meddelande----->
>> From: MikeLDrew at aol.com [MikeLDrew at aol.com]
>> Sent: 5/5/2013 7:02:08 PM
>> To: tmshinro at aol.com; detomaso at poca.com
>> Subject: Re: [DeTomaso] A/C condensor fan test results
>>
>> In a message dated 5/5/13 6 01 38, tmshinro at aol.com writes:
>>
>>
>>> Just curious what is the solution to the evaporator icing up...dial
> in
>>> some heat from the heater?
>>>
>>>
>>
>>>>> ...or select a slightly warmer setting on the A/C temp control.
>> People
>> treat it like an on/off switch, but it is a rheostat, and you can
> select
>> an
>> intermediate setting which might enable it to run continuously?
>>
>> Mike
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>
>
> -- 
> Real life: Thomas Törnblom Email: thomas at hax.se
> Snail mail: Banvallsvägen 14 Phone: +46 18 32 31 18
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